It's a soilless media, which can be used by itself or mixed with other medias to improve the soil compaction & water retention. Coco Coir is versatile, with uses ranging from hydroponics to baskets. The name suggests where it is derived from – coconuts of course!
If you're looking for a great soilless media, look no further than Coco Coir Bricks!
We source our Coco Coir from trusted manufacturers, which means peace of mind for you & your garden. Our Coco Coir has been aged naturally, so it is ready for use when It arrives. No need to worry about the soil compacting.
Coco Coir is also much lighter than many other growing mediums, so you can use it in baskets & containers with ease - with the added benefit of keeping moisture in. Let us know how our Coco Coir works for you!
pH | 5.4 - 6.8 |
Ash (dry basis %) | 3 - 6 |
Electrical conductivity (uS/cm) max | 250 |
Cationic exchange capacity (meq/100g) | 60 - 130 |
Total Organic Matter (w/w, dry basis %) | 94- 98 |
Organic Carbon (w/w, dry basis %) | 45 -50 |
Water holding capacity (of dry weight) | 8 - 9 times |
Air filled porosity (v/v, %) | 10 - 12 |
Total pore space (v/v, %) | 94 - 96 |
Free shipping on orders over $75 to Contiguous US
Most products will ship from our facility in 1 to 2 business days after the order is placed. Express shipments placed after 12PM EST will be shipped out next business day. Full details can be found on our Shipping Policy Page
Returns can be made on most products within 30 days of purchase. After 30 days we unable to offer a refund or exchange. Certain products are non-returnable. For full details visit our Returns Policy
If I don't need the entire brick at one time, can I cut off how much I need before hydrating, or hydrate the entire brick and store the leftover loose product (after letting it fully air dry, I assume)? If the latter, for how long in what container can I store it?
The easiest thing to do is either cut off a piece of the coco brick or just hydrate a potion of it and tear off what you need.
Are these bricks 1/3 cu ft before or after they are hydrated?
The coco coir expands to 1/3 cubic foot after hydration.
I bought 10 bricks, but the packaging has no label/rehydration ratio instructions. How much warm water to rehydrate each brick? And. Can I assume your cox coir supplier has washed the coir so I don't need to? Thanks!
Each coco coir brick will expand with approximately 4 to 5 quarts (1 to 1.25 gallons) of warm water. Let it soak for about 15–30 minutes, then fluff to fully break it apart. You can add more water gradually if the texture seems too dry.
As for rinsing:
Our coco coir is pre-rinsed and buffered by the manufacturer, and generally ready to use right out of the package. That said, coco coir (and rockwool) can sometimes retain salts from the manufacturing process. While further rinsing isn’t typically required, it can help lower the EC (electrical conductivity) — which is what really matters when determining if a rinse is necessary.
For reference:
Our Open Top Grow Bags have an EC of < 1.0 mS/cm
The Coco Coir Bricks have an EC of < 2.5 mS/cm
If you're growing sensitive seedlings or hydroponically, you may choose to rinse and check EC as a precaution — but for most uses, additional rinsing isn’t needed.
can the material be reused on several crops over time?
We do not recommend reusing growing medium because it can contaminate future microgreen trays. You can find our recommendations for what to do with spent trays here: https://www.bootstrapfarmer.com/blogs/microgreens/reusing-spent-microgreen-trays