Ready-to-Fruit Oyster Mushroom Grow Cup 

Grow fresh oyster mushrooms right at home with our Ready-to-Fruit Oyster Mushroom Deli Cup. Each cup is fully colonized with vigorous oyster mycelium grown on recycled Starbucks “Grounds for Your Garden” coffee grounds. Just open the lid, mist lightly, and harvest your own gourmet mushrooms in about a week.

This is the easiest, most beginner-friendly way to start growing mushrooms, no equipment, no experience, no prep.

How It Works

We mix fresh coffee grounds with high-quality oyster mushroom spawn, allow the mycelium to fully colonize the substrate, and package it into clean deli cups. When you receive your cup, it’s already alive, healthy, and ready to fruit.

Just open, introduce fresh air and humidity, and watch mushrooms appear.

What You’ll Get

• One 32 oz deli cup packed with fully colonized oyster mycelium

• Ready to fruit immediately

• Grown on recycled Starbucks coffee grounds

• Fast, reliable, beginner-friendly mushroom variety

• Perfect for kids, classrooms, gifts & home kitchens

These cups often produce mushrooms within 5–10 days of arrival.

How to Fruit Your Grow Cup

1. Remove the lid or cut 1–2 small slits in the side.

2. Place in a spot with indirect light and good airflow.

3. Mist lightly once or twice a day to keep the surface from drying out.

4. Harvest when caps are still slightly curled downward.

After fruiting, add the spent block to your garden, compost, or raised beds — the mycelium continues enriching the soil.

Why We Use Starbucks Coffee Grounds

Coffee grounds are:

• Pre-pasteurized by brewing

• Nutrient rich

• Perfectly hydrated

• Readily available & sustainable

Oyster mushrooms absolutely thrive on this material, making it one of the fastest, cleanest ways to grow mushrooms at home.

Great For

• First-time growers

• Gardeners & homesteaders

• Teachers & classrooms

• Gifts & DIY projects

• Anyone curious about the magic of fungi

Important Notes

• This product contains live mycelium.

• Store at room temperature if fruiting immediately.

• Keep out of direct sunlight.

• For educational, culinary, and gardening purposes only.*

*These statements have not been evaluated by the FDA.