Why is one of my Oyster kits not growing and the other is?

Do not worry, this is perfectly normal, explained below.

Oyster Mushroom Growth Rates - Understanding Different Growth Speeds

Quick Growth Facts

Different kits naturally grow at different speeds, so its best not to compare species.

Pink Oysters

Typically grow faster During summer thatn yellow, in winter, can reverse.

Yellow Oysters

Prefer cooler temperatures and times of year

Age of kit affects growth speed, all kits are hand planted, so you may recieve a "younger" kit alongside an "older" kit, this affects speed but is perfectly normal.

Why Is One Kit Growing and the Other Isn't?

Don't Worry! Different growth speeds between kits / species is completely normal and not a cause for concern.

By nature, different kits can grow at different speeds. This variation is perfectly normal in mushroom cultivation.

Common Reasons for Different Growth Rates

Kit Age: "Younger" kits have less developed mycelium and may be behind
Species Differences: Pink and Yellow oysters naturally grow at different rates, climate dependant.
Temperature Variations: Even small differences in location can affect growth
Species differences: Like plants, each kit has unique characteristics

Kits at different growth stages - completely normal

Pink vs Yellow Oyster Growth Rates

Characteristic	Pink Oyster	Yellow Oyster
Typical Growth Speed	Faster (5-7 days to pins)	Moderate (7-10 days to pins)
Ideal Temperature	17-21°C	14-20°C
Best Season	Warmer months (Spring/Summer)	Cooler months (Autumn/Winter)
Growth Pattern	Rapid burst growth	Steady, consistent growth
Special Notes	More exotic - benefits from extra warmth	Can outperform pinks in cooler conditions

Temperature Tip for Pink Oysters:

Pink Oyster mushroom kits are more exotic, so to help them along, consider increasing the room temperature by a couple of degrees Celsius to speed things along. They thrive in temperatures around 17-21°C

What Should I Do If One Kit Isn't Growing?

Action Steps:

Be Patient: Give kits another week to catch up
Check Moisture: Ensure compost is moist, not wet
Remove Pooling Water: Dab away any standing water
Maintain Temperature: Keep within ideal range
Continue Misting: Spray twice daily as normal

⚠️ Common Problem: Too much water in the compost

If compost is too wet, mycelium struggles to colonize toward growing holes and won't fruit. Always dab away pooling water!

Incorrectly watered kit, with problematic pooling water

Expected Growth Timeline

⚠️ Mycelium Differences Please note Yellow and Pink Oyster mycelium, will appear very differently. Pink is very fine, where as yellow will blanket over the compost in thick white mycelium.

Do not be worried by this, it is normal and to be expected.

Normal Growth Progression:

Days 1-2: Mycelium visible in holes, white fuzz appears
Days 3-6: Small pins (baby mushrooms) begin forming
Days 7-8: Rapid growth, caps expanding daily
Days 9-10: Ready to harvest when caps flatten

Remember: Some kits may be 3-5 days behind this schedule - that's perfectly normal! Environmental factors and kit age can shift these timelines.

Pro Tip: If one kit is ahead, harvest it when ready. Do not worry about harvesting both at the same time.

Growth Troubleshooting Checklist

Temperature within range: Pinks 17-21°CYellows 14-20°C

Compost is moist but not waterlogged - no pooling water

Spraying twice daily with fine mist, not soaking

Kits positioned away from direct heat or cold drafts

Good air circulation but protected from strong drafts

Patience - Sometimes it can take up to two weeks to crop.

Key Takeaways

Remember: Variable growth rates are natural! By nature different growth speeds is normal.

Final Growing Tips:

Don't Compare Too Much: Each kit is unique
Focus on Conditions: Proper temperature and moisture matter most
Trust the Process: Most "slow" kits catch up within a week
Enjoy the Journey: Watching different growth rates is part of the fun!

The best approach is patience combined with vigilant care. Keep conditions optimal, maintain proper moisture levels (moist, never wet), and your slower kit should catch up. If after two weeks there's still no growth, feel free to contact us Contact us for more specific guidance.