Midwest Grow Kits
3-Pack Premium 24 Oz Super-Quick-Colonizing 5-grain Jar (24oz)
3-Pack Premium 24 Oz Super-Quick-Colonizing 5-grain Jar (24oz)
3-Pack Premium 24oz Super Quick Colonizing 5-Grain Jars
Lightning-Fast Colonization, Tapered Jar Design & Sterile Grain Spawn for Easy Bulk Growing
Grow faster with Midwest Grow Kits 3-Pack Premium 24oz Super Quick Colonizing 5-Grain Jars. These custom 24oz tapered glass grain spawn jars are built for growers who want rapid colonization, easy inoculation, and a jar design that makes colonized grain easier to remove when it is ready for bulk substrate or other expansion.
Compared to standard 32oz jars, these 24oz jars are known for faster average colonization times thanks to their smaller size, efficient grain mass, and optimized 5-grain blend. The custom tapered shape also helps the colonized jar contents slide out more easily once fully grown, making transfer cleaner and more convenient.
Why growers love these jars: They colonize faster than larger 32oz jars, use a high-performance 5-grain blend, and feature a tapered glass design that helps the finished colonized cake slide out with less effort when it is time to spawn to bulk.
Why Choose Our 24oz Super Quick Colonizing Jars?
- The Fastest Grain Spawn Product We Sell – Unique jar shape and size helps support quicker average colonization times.
- Tapered Glass Design – Makes it easier to slide the fully colonized grain mass out of the jar.
- Rapid Colonization Blend – High ratio of smaller grains helps create more inoculation points.
- Clean & Easy Inoculation – Self-healing injection port works with spores or liquid culture.
- Reliable Gas Exchange – Premium 0.22 micron filter disk supports airflow while helping maintain sterility.
- Great for Bulk Growing – Ideal for monotubs, trays, casing mix, and bulk substrate expansion.
What’s Included
- Three (3) 24oz Tapered Glass Grain Spawn Jars
-
Premium 5-Grain Blend featuring:
- Nutrient-enriched rye berries
- A high ratio of smaller grains for fast colonization
- Special mineral water mix fortified with gypsum and diammonium phosphate
- 0.22 Micron Filter Disk for sterile gas exchange
- Self-Healing Injection Port for clean inoculation
- Pressure Sterilized at 15 PSI for 120 Minutes
Product Specifications
| Component | Details |
|---|---|
| Jar Size | 24oz Tapered Glass Jars |
| Pack Size | 3 Jars Per Pack |
| Grain Blend | Premium quick-colonizing 5-grain blend with nutrient-enriched rye berries and a high ratio of smaller grains |
| Additives | Gypsum and diammonium phosphate in a mineral water blend |
| Filter Type | 0.22 micron filter disk |
| Injection Port | Self-healing port for spores or liquid culture |
| Sterilization | 15 PSI for 120 minutes |
| Average Colonization Time | Approximately 14–20 days |
| Recommended Inoculation | 3–4cc per jar |
Recommended Usage Chart
Use this quick chart as a general guide when planning your grow.
| Application | Recommended Amount | Notes |
|---|---|---|
| Spore Syringe per Jar | 3–4cc | Inject through the self-healing port for clean inoculation |
| Liquid Culture per Jar | 4-6cc | Great choice for very fast colonization when using clean culture |
| Bulk Substrate Ratio | 2–3 jars per 5 lbs of bulk casing mix | Recommended for monotub and bulk substrate grows |
| Average Colonization Window | 14–20 days | Often faster than standard 32oz grain jars |
Designed for Speed and Easy Transfer
These jars are built for growers who want both speed and convenience. The smaller 24oz size can colonize more quickly than larger jar formats, while the tapered glass shape makes it easier to remove the finished colonized grain when it is time to break it up or spawn it to bulk substrate.
That makes these jars an excellent option for growers using bulk casing mix, monotubs, and other bulk fruiting setups where fast turnaround and easy jar handling can improve the overall workflow.
Premium 24oz Grain Spawn Jars for Faster Mushroom Cultivation
The Midwest Grow Kits 3-Pack Premium 24oz Super Quick Colonizing 5-Grain Jars gives growers a sterile, ready-to-use grain spawn option designed for fast colonization, easy inoculation, and simpler transfer into bulk substrate. If you want a jar that moves quickly and is easier to empty once colonized, this is one of the best options in the lineup.
New to Grain Spawn?
Learn exactly how to inoculate, incubate, and fully colonize your spawn bags or grain jars with our step-by-step guide.
Read the Full Guide →
- All-in-one, ready to grow
- Produces multiple flushes
- High-quality, USA-made
- Great for home or classroom use
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