3-Pack Original Rye Grain Jars (32oz)
3-Pack Original Rye Grain Jars (32oz) is backordered and will ship as soon as it is back in stock.
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Description
Description
Our Original Rye Grain Spawn Jars are three sterilized 32oz wide-mouth glass jars of hydrated rye berries — the classic single-grain spawn — ready for spores or liquid culture.
Rye's uniform kernels, moisture balance and nutrient profile make it dependable to colonize, easy to shake and simple to spawn to bulk. Each lid has a self-healing injection port and a 0.22 micron filter patch.
- 3 jarsPer pack
- 32ozWide-mouth glass
- RyeSingle grain
- 0.22 µmFilter patch
- 5–7ccLiquid culture
Why growers pick rye jars
- Classic rye performance – Uniform kernels with good moisture balance and nutrient density for dependable colonization.
- Easy to shake – Rye kernels separate cleanly when shaken, so recovery after a shake is quick.
- Clean inoculation – Self-healing injection port and a 0.22 micron filter patch on every lid.
- Sterile and ready – Hydrated and pressure-sterilized, ready for spores or liquid culture.
- Built for bulk – Colonized rye spreads evenly through bulk substrate for monotubs, trays and grow bags.
What's in the pack
- Three 32oz wide-mouth glass jars
- Premium hydrated rye berries
- Self-healing injection port and 0.22 micron filter patch on every lid
- Hydrated and pressure-sterilized
How to use them
- Prep. Wipe the injection port with alcohol and use a sterile needle and syringe.
- Inoculate. Inject 3–4cc of spore solution or 5–7cc of liquid culture through the self-healing port. Not sure how many syringes to buy? Use our syringe calculator.
- Incubate. Keep the jar warm, out of direct light and undisturbed until mycelium is clearly growing.
- Shake. At about 25–30% colonization, shake the jar to break up the grain and spread the mycelium, then let it finish.
- Spawn to bulk. Once the jar is fully white, break it up and mix it evenly into bulk substrate in your monotub.
From jar to bulk monotub
Inoculating a grain jar, letting it colonize, breaking it up and mixing it into bulk substrate for a monotub grow:
New to grain spawn? Our Spawn Bag & Grain Jar Guide walks through inoculating, incubating and fully colonizing grain jars and spawn bags step by step.
How many jars per monotub?
Plan on 1–2 jars per 5 lbs of bulk substrate. By tub size:
| Monotub | Bulk substrate | 32oz jars | 24oz jars |
|---|---|---|---|
| Small 28Q | About 4 lbs | 1 | 2 |
| Medium 44Q | 7.5 lbs | 2–3 | 3–4 |
| Large 66Q | 10 lbs | 2–4 | 4–6 |
Compare our grain jars
| Jar | Grain | Jar style | Liquid culture | Per 5 lbs substrate | Best for |
|---|---|---|---|---|---|
| Premium 5-Grain 32oz | Rye, milo & millet blend | Wide-mouth glass | 5–7cc | 1–2 jars | More inoculation points |
| Super Quick 5-Grain 24oz | 5-grain, extra small grains | Tapered glass | 4–6cc | 2–3 jars | Fastest colonizing; cake slides out |
| Original Rye 32oz (this jar) | Rye berries | Wide-mouth glass | 5–7cc | 1–2 jars | Classic single-grain spawn |
Specifications
| Specification | Detail |
|---|---|
| Jar | 32oz wide-mouth glass |
| Pack size | 3 jars |
| Grain | Premium hydrated rye berries |
| Filter | 0.22 micron filter patch |
| Injection port | Self-healing, for spores or liquid culture |
| Sterilization | Hydrated and pressure-sterilized |
| Inoculation | Spores 3–4cc or liquid culture 5–7cc per jar |
| Bulk ratio | 1–2 jars per 5 lbs of bulk substrate |
| Shelf life | Best within 90 days; up to 120 days refrigerated |
Storage: Every jar is made fresh. Inoculate within 90 days for best results, or refrigerate uninoculated jars to keep them up to 120 days.
Pair it withSpawn colonized jars into Select Bulk Substrate. Prefer bags? Try our Original Rye Spawn Bags.
FAQ
Why use rye grain for mushroom spawn?
Rye berries have a consistent kernel size, good moisture balance and plenty of nutrients, which makes them a dependable grain for colonizing, shaking and spawning to bulk.
How much spore solution or liquid culture per jar?
3–4cc of spore solution or 5–7cc of liquid culture, injected through the self-healing port after wiping it with alcohol.
How long does a jar take to colonize?
It depends on the strain, temperature and inoculant. Liquid culture usually colonizes faster than spores. If speed is the priority, our 24oz Super Quick jars are the fastest-colonizing jar we sell.
When should I shake the jar?
At about 25–30% colonization. Shake to break up the grain and spread the mycelium, then let the jar finish colonizing.
How many jars do I need for my monotub?
Plan on 1–2 jars per 5 lbs of bulk substrate. For a Small 28Q with about 4 lbs, one 32oz jar is enough; a Medium 44Q takes 2–3 jars and a Large 66Q 2–4.
How long do uninoculated jars keep?
They are made fresh. Use them within 90 days for best results, or refrigerate them to keep them up to 120 days.
Should I choose rye or 5-grain?
Both inoculate the same way. Rye is the classic single-grain spawn with uniform kernels; our 5-grain jars mix kernel sizes for more inoculation points.
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