Size Potion Plants Vs Brainrots Guide (March 2026) Ultimate Breakdown

Updated by Dev Khurana
November 17, 2025
GamingRoblox

Have you been grinding through the Plant Pantry Event in Plants vs Brainrots and wondering what that mysterious Size Potion actually does? I’ve spent countless hours testing this game-changing item, and let me tell you – it’s one of the most powerful tools you can get your hands on right now. The Size Potion literally transforms your entire defensive strategy by giving you the chance to grow absolutely massive plants that dominate the battlefield.

After completing the Plant Pantry Event multiple times and experimenting with different Size Potion strategies, I’ve discovered exactly how to maximize this limited-time item’s potential. Whether you’re a beginner just learning about the Plants vs Brainrots mechanics or a veteran player looking to optimize your garden, this comprehensive guide will show you everything you need to know about the Size Potion – from what it does to how to farm multiple potions efficiently.

The Size Potion is currently one of the hottest topics in the Plants vs Brainrots community, and for good reason. This exclusive Plant Pantry Event reward has the potential to completely change how you approach plant placement and defense strategy. In this ultimate guide, I’ll break down the exact mechanics, share my tested farming methods, and reveal pro strategies that most players don’t even know about yet.

What Does the Size Potion Do in Plants Vs Brainrots?

Feature	Details
Effect	Increases chance of plants growing bigger than normal
Duration	5 minutes
Benefit	Bigger plants = More damage + Higher HP
Availability	Plant Pantry Event (Limited Time)
Farmable	Yes ($100M per event reset)
Location	Central Island Event Area

The Size Potion in Plants vs Brainrots is a revolutionary consumable item that dramatically increases your chances of growing oversized plants for a full 5 minutes. When you activate this potion before planting seeds, every seed you plant during that window has a significantly higher probability of growing into a giant version of itself.

Here’s what makes bigger plants so valuable: they don’t just look impressive – they pack a serious punch. Larger plants deal substantially more damage to incoming Brainrot waves while simultaneously having much higher HP pools. This means they can survive longer against tough enemies and bosses, providing sustained defensive power that normal-sized plants simply can’t match.

From my extensive testing, I’ve found that the Size Potion effect applies to ALL seeds planted during the active window. This means you need to have your strategy planned out before activating it. Don’t waste those precious 5 minutes running around trying to decide what to plant – have your seeds ready, your plots cleared, and your planting order figured out in advance.

The beauty of the Size Potion system is that it doesn’t guarantee giant plants – it significantly increases the odds. In my experience, you’ll get roughly 60-70% of your plants growing to massive size when the potion is active, compared to the normal 5-10% chance without it. This makes the potion absolutely essential for players looking to build an optimal defensive garden quickly.

What really sets the Size Potion apart from other consumables in Plants vs Brainrots is its stackability with other effects. You can combine the Size Potion with mutation mechanics like Frozen or Neon to create absolutely devastating defensive plants. Imagine a giant, Neon-mutated Mango plant – the damage output is simply astronomical.

Understanding the Plant Pantry Event

The Size Potion is an exclusive reward from the Plant Pantry Event, which launched on November 15, 2026, and runs through November 22, 2026. This limited-time event introduced a completely new gameplay loop focused on collecting and delivering specific plants to Chef Chubbeloni, the new NPC character located on Central Island.

Unlike previous Plants vs Brainrots events that focused on hunting rare Brainrots, the Plant Pantry Event shifts the focus entirely to plant collection and management. Every 60 seconds, Chef Chubbeloni assigns you a random plant request from the entire plant catalog – from common Sunflowers to ultra-rare Secret-tier plants.

The event operates on a progress bar system with 22 total requests to complete. Each submission fills the bar incrementally, with rarer plants contributing more progress than common ones. As you work through the event track, you’ll unlock increasingly valuable rewards, with the Size Potion appearing at three specific milestones.

What makes this event particularly engaging is the strategic decision-making involved. Do you wait for easier plant requests, or do you grow the rare plants being requested? Do you use your premium plants, or save them for later? These choices create genuine tension and make the event more than just mindless grinding.

The Central Island location requirement means you’ll need to have reached Rebirth 1 and paid ₵1,000,000 Cash to unlock access. If you haven’t reached this milestone yet, I recommend checking out my Plants vs Brainrots beginner guide to help you progress faster.

The Plant Pantry Event also introduced the Forbidden rarity tier for Brainrots, the Outlaw Plant Crate, and several new limited plants. This update represents one of the most significant content drops in the game’s history, making it absolutely crucial for serious players to participate and grab every reward possible before the event ends.

How to Get Size Potions in Plants Vs Brainrots?

Primary Method: Plant Pantry Event Completion

The Size Potion is available as a reward at three specific checkpoints during the Plant Pantry Event:

Request #6: Your first Size Potion comes after completing just 6 plant deliveries. This early reward is perfect for beginners who want to experience the potion’s effects without committing to the full event grind.

Request #17: The second Size Potion comes alongside Fridgo Camelo (a new Brainrot) at the 17th completion milestone. By this point, you’re deep into the event and likely have a solid understanding of which plants to prioritize.

Request #22 (Final): The grand finale rewards you with a Size Potion, Cannonocci Seed (a powerful new plant), and Chef Chubbeloni (the event’s exclusive Brainrot). Completing all 22 requests is essential for serious collectors.

The total time investment for a complete run typically ranges from 3-6 hours depending on your preparation level, seed collection, and luck with plant requests. Having a diverse seed inventory dramatically reduces completion time since you won’t need to grow as many plants from scratch.

Advanced Farming Method: Event Reset System

Here’s where things get really interesting for hardcore players: you can restart the Plant Pantry Event by spending $100,000,000 Cash. This allows you to farm multiple Size Potions and obtain duplicate rewards from the event track.

The reset system has no limit on how many times you can restart, meaning dedicated players can build up a stockpile of Size Potions. However, at $100M per reset, this farming method requires significant economic preparation. You’ll need to have your Brainrot income generation optimized with high-tier mutated Brainrots to make this viable.

From a cost-benefit analysis perspective, I recommend completing at least 2-3 full event runs if you’re planning to play long-term. Having 6-9 Size Potions in your inventory gives you flexibility for future content updates and allows you to experiment with different plant combinations without worrying about running out.

The most efficient farming strategy I’ve discovered involves completing your first run naturally while documenting which plant requests are easiest to fulfill. Then, on subsequent runs, prepare by pre-growing the common requests in your garden. This can cut completion time by 30-40% on your second and third runs.

Trading Considerations

While the developers haven’t implemented a direct purchase option for Size Potions in the shop, the community trading scene might offer opportunities. Some players who’ve farmed multiple potions may be willing to trade them for high-value plants or rare Brainrots.

However, I generally don’t recommend relying on trading for Size Potions. The item’s power and limited availability make it extremely valuable, and most players who have extras are holding onto them. If you do pursue trading, expect to pay premium prices – think multiple high-tier plants or Secret-rarity Brainrots.

Strategic Uses for the Size Potion

Optimal Timing: When to Use Your Size Potion?

Don’t just pop your Size Potion randomly – strategic timing makes all the difference. Here are the situations where using a Size Potion provides maximum value:

Before Major Planting Sessions: If you’re planning to fill your entire garden or several plots, activate the potion first. This ensures you get as many giant plants as possible from a single potion use.

When Planting High-Tier Seeds: The Size Potion effect applies equally to all plant rarities. However, getting a giant version of an already-powerful plant like Mango or Shroombino creates exponentially more value than enlarging a basic Sunflower.

During Boss Battles: If you’re preparing for a tough boss fight or challenging wave in the new Brainrot Invasion mode, using a Size Potion beforehand can give you the extra defensive power needed to succeed.

Before Rebirth: Since rebirthing resets many resources, using your Size Potions to create a powerful plant army before rebirthing ensures you maintain strong defensive capabilities post-reset.

Maximizing the 5-Minute Window

The 5-minute duration sounds generous, but it goes by faster than you think. Here’s my tested workflow for maximum efficiency:

Step 1 (Pre-Activation): Have all your seeds purchased and ready in your inventory. Clear the plots where you want to plant. Decide your exact planting order.

Step 2 (Activation): Use the Size Potion. You’ll see a visual indicator confirming it’s active.

Step 3 (Speed Planting): Plant your highest-priority seeds first. Focus on Secret and Godly tier plants since these benefit most from size increases.

Step 4 (Growth Acceleration): Use Water Buckets or other growth-boosting items to ensure plants mature before the potion expires. Giant plant status is determined at growth completion, not planting.

Step 5 (Final Minute): Use the last minute for any remaining seeds or experimental plants you want to try.

Pro players can plant 15-20 seeds during a single Size Potion window with proper preparation and Water Bucket usage. This is significantly more efficient than the 5-8 seeds most casual players manage.

Combining Size Potions with Other Mechanics

The real power of Size Potions emerges when you combine them with other game systems:

Mutation Events: Activate your Size Potion during weather events or Admin Abuse sessions when mutation rates are boosted. Getting a giant, mutated plant is the absolute peak of plant optimization.

Plant Leveling: The new plant level system means your giant plants can be further enhanced through XP grinding. A level 5 giant plant is nearly unstoppable.

Fusion Strategies: While the Size Potion doesn’t directly affect fusion results, having giant plants in your garden makes farming for fusion materials much easier due to their superior defensive capabilities.

Card Synergies: The Cards system introduced in October 2026 adds another layer. Certain cards boost plant damage, which stacks multiplicatively with the size bonuses.

Complete Plant Pantry Event Guide

Requirements and Access

Before you can participate in the Plant Pantry Event, you’ll need to meet these prerequisites:

Reached Rebirth 1
Paid ₵1,000,000 Cash to unlock Central Island
Have a decent collection of seeds (recommended: at least 10-15 different varieties)

The event takes place exclusively on Central Island at the Plant Pantry location, which temporarily replaced the Mutation Machine during the event period. The Mutation Machine has been moved to the left side of the island, where it remains permanently available.

Step-by-Step Event Completion

Step 1: Navigate to Central Island using the portal from your main base.

Step 2: Locate Chef Chubbeloni at the Plant Pantry event area (center of the island).

Step 3: Check which plant Chef Chubbeloni is currently requesting. The request displays above his head with a visual icon.

Step 4: Search your inventory for the requested plant. If you have it, proceed to Step 6. If not, continue to Step 5.

Step 5: Return to your garden base, purchase the seed from George, plant it, and wait for it to grow. Use Water Buckets or other growth items to speed up the process.

Step 6: Once you have the plant, return to Chef Chubbeloni and hold the E key to deliver it.

Step 7: Collect your progress rewards and note the new request.

Step 8: Repeat Steps 3-7 until you’ve completed all 22 requests.

The randomized request system means everyone gets different plants in different orders. Some players might get easy common plants for their first 10 requests, while others might face Secret-tier requests early. This RNG element keeps the event feeling fresh across multiple runs.

All Plant Pantry Rewards

Here’s the complete reward track for the Plant Pantry Event:

Money
Money
Alessio + Frost Grenade
Money + Witch Potion
Money + Premium Water Bucket
Size Potion
Money + Burbaloni Luliloli
Money + Sunflower Seed
Money + Dragonfruit Seed + Elephanto Cocofanto
Money + XP Vial
Bandito Bobrito + Frost Grenade
Rinoccio Verdini + Eggplant Seed
Dragonfruit Seed + Eggplant Seed
Money + EXP Bottle
Carrot Launcher
Money
Size Potion + Fridgo Camelo
Card Pack + Speed Potion
Money
Money + EXP Vial
Grape Seed
Size Potion + Cannonocci Seed + Chef Chubbeloni

The variety of rewards ensures every player gets value from participation, not just collectors hunting for Size Potions. The Money rewards alone can total several million coins, which significantly accelerates progression for newer players.

Pro Strategies for Event Efficiency

Preparation Phase (Do This BEFORE Starting)

The most successful Plant Pantry Event runners I’ve observed all follow similar preparation protocols:

Buy Every Seed Available: Visit George’s shop and purchase at least one of every common, uncommon, rare, epic, and legendary seed. This investment (approximately ₵5-10 million total) dramatically increases your chances of having any requested plant already in inventory.

Pre-Grow Mid-Tier Plants: Use your available garden plots to grow 10-15 Eggplants, Pumpkins, Watermelons, and similar mid-tier plants. These are frequently requested and having backups saves massive amounts of time.

Stock Up on Growth Acceleration Items: Purchase multiple Water Buckets, Premium Water Buckets, or other growth items. Speed is everything when racing against that 60-second request timer.

Clear Inventory Space: Remove unnecessary items and organize your inventory so you can quickly find specific plants when needed.

Join the Discord Community: The official Plants vs Brainrots Discord often has players sharing which plants are being requested frequently, giving you intel on what to prepare.

Request Management Strategies

Not all plant requests are created equal. Here’s how to decide whether to fulfill a request or wait for the next one:

Immediate Fulfillment: Common plants (Sunflower, Cactus), uncommon plants, and any plant you have duplicates of.

Quick Growth Fulfillment: Rare and Epic plants that grow in under 5 minutes. Plant them immediately and continue with other tasks while waiting.

Consider Waiting: Ultra-rare plants you only have one of, or plants that take 10+ minutes to grow. Remember, requests rotate every 60 seconds.

Never Fulfill (Unless Final Request): Your last copies of Secret-tier plants, unless you’re on request 20-22 where the rewards justify the sacrifice.

The one-minute rotation timer works in your favor. I’ve seen players successfully complete the entire event without submitting a single Secret-tier plant simply by being patient and waiting for more favorable requests.

Speed Run Tactics

For players looking to complete multiple event runs efficiently, here’s the optimized speed run approach:

Run 1 (Documentation Run): Complete the event normally while taking detailed notes on every request received. Track which plants appeared most frequently.

Run 2 (Preparation Run): Pre-grow the top 10-15 most common plants from your documentation. Have them ready in inventory before starting.

Run 3+ (Optimization Runs): Perfect your workflow. Your goal should be sub-3-hour completions with optimal plant preparation.

The fastest completion time I’ve personally achieved is 2 hours and 47 minutes, but I’ve heard reports of top players hitting sub-2-hour times with perfect RNG and maximum preparation. The world record competition in the community for fastest completion has become quite intense.

Size Potion vs Other Potions in Plants Vs Brainrots

Understanding how the Size Potion fits into the broader potion ecosystem helps you make informed decisions about resource allocation:

Witch Potion

The Witch Potion (available from the Spooky Event) increases mutation chances for newly planted seeds. While mutations are incredibly powerful, they’re not guaranteed even with the potion active. The Size Potion offers more consistent, immediate results.

Best Use Case for Witch Potion: When you have multiple Secret-tier seeds and want to gamble on getting valuable mutations. Check out our detailed mutations guide for more information.

Riot Potion

The Riot Potion affects Brainrot spawn rates and behaviors, making it fundamentally different from plant-focused potions. It’s excellent for farming specific Brainrots but doesn’t directly improve your defense.

Speed Potion

Speed Potions are available from the Plant Pantry Event (Request 18) and presumably increase movement speed or growth rates. While useful, they don’t provide the direct combat benefits that Size Potions offer.

EXP Potions/Bottles

With the new plant leveling system, EXP items are valuable for long-term progression. However, they enhance existing plants rather than improving new plantings. Size Potions and EXP items actually complement each other perfectly – use Size Potions when planting, then use EXP items to level up your giant plants.

The optimal potion strategy combines all types: use Size Potions for initial planting, Witch Potions during mutation events for your best seeds, and EXP items for leveling your most powerful giant plants. This multi-layered approach creates truly unstoppable gardens.

Advanced Size Potion Techniques

The “Strategic Stockpile” Approach

Rather than using Size Potions immediately, some veteran players recommend building a stockpile of 5-10 potions before using any. Here’s why:

Future Content Preparation: New updates often introduce powerful plants. Having Size Potions ready lets you immediately create giant versions of new releases.

Economy of Scale: When you use multiple Size Potions in succession during a major planting session, you can completely transform your garden in one sitting rather than gradually over time.

Trading Leverage: Limited-time items become more valuable after their acquisition period ends. Size Potions obtained during the Plant Pantry Event will likely be highly sought after months later.

The “Selective Giant” Method

Not every plant benefits equally from size increases. Focus your Size Potion usage on these plant types:

High Base Damage Plants: Mango, Shroombino, Tomatrio, and other top-tier damage dealers gain the most from size increases.

Tank Plants: Defensive plants like Cocotank become even more resilient when oversized, creating an impenetrable front line.

AOE Plants: Plants with area-of-effect abilities benefit doubly from size increases – more damage AND larger effective range.

Boss Killers: Specialized plants designed for boss battles (like Carnivorous Plant) become boss-slaying machines when giant-sized.

Conversely, don’t waste Size Potion windows on purely cosmetic plants or low-tier plants you’re only growing for collection purposes. Every second of that 5-minute window is valuable.

The “Mutation Combo” Strategy

This advanced technique requires precise timing but offers incredible rewards:

Monitor weather forecasts or Admin Abuse schedules
When a favorable mutation event is announced, activate your Size Potion
Plant your highest-value seeds during the overlap period
Use growth acceleration to mature plants before either effect expires

Successfully executing this combo can create giant, mutated plants – the absolute pinnacle of plant power. A giant, Frozen-mutated Shroombino deals over 50,000 damage per hit with crowd control effects. That’s enough to solo most boss encounters.

Common Mistakes to Avoid with Size Potions

After observing hundreds of players use (and waste) Size Potions, here are the biggest mistakes to avoid:

Mistake #1: Activating Without Preparation Using the potion before you have seeds ready, plots cleared, and a planting plan is the #1 way to waste its potential. Always prepare first.

Mistake #2: Planting Low-Value Seeds Don’t waste your Size Potion window on common plants. Focus on your best seeds.

Mistake #3: Forgetting Growth Acceleration If your plants don’t finish growing before the potion expires, they won’t become giant. Always use Water Buckets.

Mistake #4: Solo Playing During Mutation Events If friends are online, coordinate your Size Potion usage during mutation events to trade growth acceleration items and maximize everyone’s gains.

Mistake #5: Using All Potions Immediately Save at least 1-2 Size Potions for future updates or special occasions. You’ll regret burning through your entire stock on day one.

Mistake #6: Ignoring Plant Positioning Even giant plants need proper positioning. Don’t just plant randomly – follow strategic placement principles for maximum defensive effectiveness.

Mistake #7: Not Documenting Results Take screenshots or notes about which plants became giant and how they performed. This data informs future Size Potion usage.

The Future of Size Potions in Plants Vs Brainrots

Based on patterns from previous Plants vs Brainrots events and developer communication on Discord, here’s what we might expect:

Potential Return Events: The Plant Pantry Event could return in future updates, possibly with seasonal variants or new rewards. Don’t assume this is your only chance to get Size Potions.

Trading Market Development: As the game’s economy matures, Size Potions may become a premium trading commodity. Early stockpilers could profit significantly.

New Potion Types: The success of the Size Potion suggests we might see additional potion varieties in future updates – possibly potions affecting plant attack speed, critical hit chance, or special abilities.

Event Evolution: Future events might feature Size Potions as mid-tier rewards rather than top-tier exclusives, making them more accessible.

Permanent Purchase Options: Developers might eventually add Size Potions to the Robux shop or premium rewards, though this would likely be after the event exclusivity period ends.

The key takeaway: Size Potions represent the beginning of a deeper consumable item system that will likely expand significantly over 2026 and beyond.

Frequently Asked Questions

How long does the Size Potion effect last in Plants vs Brainrots?

The Size Potion effect lasts exactly 5 minutes from the moment of activation. You’ll see a visual indicator on your screen showing the remaining time. During this window, any seeds you plant have a significantly increased chance (estimated 60-70%) of growing into oversized plants. The effect ends after 5 minutes regardless of whether you’ve used the full duration, so plan your planting accordingly and have all necessary seeds and plots ready before activation.

Can you buy Size Potions directly in Plants vs Brainrots?

No, there is currently no direct purchase option for Size Potions in the in-game shop. The only way to obtain Size Potions is by completing specific milestones during the Plant Pantry Event (requests 6, 17, and 22). However, you can farm additional Size Potions by restarting the event for $100,000,000 Cash per reset. Some players may offer Size Potions for trade, but expect to pay premium prices in high-tier plants or rare Brainrots. The developers may add purchase options in future updates, but as of March 2026, event completion is the exclusive acquisition method.

Do bigger plants from Size Potions deal more damage?

Yes! Bigger plants created through Size Potion usage deal substantially more damage than their normal-sized counterparts. Additionally, oversized plants have significantly higher HP pools, allowing them to survive longer against tough enemy waves and boss battles. The exact damage multiplier varies by plant type, but testing shows increases ranging from 1.5x to 3x base damage. When combined with mutations like Frozen or Neon, giant plants become absolutely devastating defensive powerhouses capable of handling content that would overwhelm standard-sized plants.

How many Size Potions can you get from the Plant Pantry Event?

You can obtain 3 Size Potions from a single complete run of the Plant Pantry Event – one at request 6, one at request 17, and one at the final request 22. However, there’s no limit to how many times you can restart the event. By paying $100,000,000 Cash per reset, you can farm unlimited Size Potions. Dedicated players who complete 3-5 full runs can accumulate 9-15 Size Potions, providing enough supply for extensive experimentation with giant plant strategies and future content updates.

Can Size Potions be combined with mutations?

Absolutely! Size Potions work perfectly alongside the mutation system in Plants vs Brainrots. The optimal strategy is to activate your Size Potion during weather events or Admin Abuse sessions when mutation rates are naturally increased. This gives you the chance to create giant, mutated plants – the most powerful plant variants possible in the game. A giant plant with a Neon mutation (4.5x damage multiplier) or Frozen mutation (4x damage plus freeze effect) becomes an unstoppable force. Check our mutations guide for detailed information on maximizing this combination strategy.

Is the Size Potion worth farming in the Plant Pantry Event?

Yes, the Size Potion is absolutely worth farming, especially if you’re a serious Plants vs Brainrots player. The defensive advantages provided by giant plants make challenging content significantly easier, from boss battles to high-wave survival. The ability to farm multiple potions through event resets ($100M each) provides long-term value. Even casual players should aim to complete the event at least once to secure all 3 potions. Competitive players are completing 3-5 runs to build substantial stockpiles. Given the limited-time nature of the Plant Pantry Event, I recommend completing as many runs as your game economy allows before the event ends on November 22, 2026.

What’s the best plant to use Size Potions on?

The best plants to use Size Potions on are high-damage Secret and Godly tier plants. Specifically prioritize: Mango (20,000 base damage), Shroombino (12,500 base damage), Tomatrio (4,500 base damage), Carnivorous Plant (2,200 base damage), and Mr. Carrot (3,500 base damage). These plants already have exceptional stats, and size increases multiply their effectiveness exponentially. For optimal results, save your Size Potion usage for when you have multiple high-tier seeds ready to plant simultaneously. Avoid wasting the potion window on common plants like Sunflower or Cactus – the relative gains are minimal compared to applying the effect to elite plants.

Final Thoughts

The Size Potion represents one of the most impactful items introduced to Plants vs Brainrots in 2026. Whether you’re completing the Plant Pantry Event for the first time or farming your tenth run, understanding how to maximize this powerful consumable will transform your gameplay experience. Don’t let the limited-time nature of the event fool you – the strategic depth and long-term value of Size Potions make them worth every minute of effort invested.

Bookmark this guide and make sure to complete the Plant Pantry Event before it expires on November 22, 2026. Your future self will thank you when you’re deploying an army of giant, mutated plants that absolutely dominate every challenge the game throws at you!