Q: Would this be a good medium to grow watercress in?

It's great for soil less application and can hold a lot of water. I raise worms in it and use it as seed starter medium. So, I can imagine it could grow watercress as well.

Question 1

How many cubic feet does one block make?

Accepted Answer

One block can make 2.25 cubic feet fully expanded.

Question 2

How many 3 gal pots w/ ratio 40% soil, 20% org compost, approx 30% coco, 10% vermiculite/white pellets can I fill? Or your ratios/pots totals. Thanks

Accepted Answer

After hydration I get about 14 gallons of coco

Question 3

Can this be used to grow sunflower sprouts which usually require soil planting?

Accepted Answer

Absolutely. Coco is a great medium. For sproys, specifically, Id make a custom blend, using mostly coco coir more than chips. //Chips are best [my use] is to expand into big fibre chunks, by ecpanding w/ compost tea, LAB, EM1, & enzymes containing cellulase.. & a few days & you can smash the big chips a few times with a hammer.. let the microbes work at the 'glue" of the structure for a couple weeks at most- & you'll have some Awesom fibrous coco chunks creating natural drainage & aeration, without taki g up volu e thst resticts root growth like expanded rock like pumice/,perlite ,/ volcanic rock- Far beyond coco aline, though they mix Great-, or even w/ perlite/pumice.. for My aeration, I prefer big coco fibres + buckwheat hulls, perlite + pumice, small amt of small/fine vermiculite, biochar.. <- in order of higher to lower %age.
That would be mixed with High quality fresh soil, my own used soil, multiple compost/humus sources, such as my own compost plus mushroom compost & worm castings. Thats for larger bigger cash crops.

Microgreens?
You can Start out like this
%50 coco, %10 peat moss, %5 biochar, %5 rice/buckwheat/seed hulls %10 fine perlite/pumice/LavaRock, %5 Sand /+ rock dust, %5 vermiculite, %10-15 living humus/compost/castings..
Use that at a 50/50 plus extra %10 humus & dry nutrients to recompost & recycle.
A small amount of natural compost, or even a soilless mix adding some.
If extra nutrients are needed- is a compost tea.

Question 4

Would this be a good medium to grow watercress in?

Accepted Answer

It's great for soil less application and can hold a lot of water.  I raise worms in it and use it as seed starter medium.  So, I can imagine it could grow watercress as well.

ASIN	B06W9F7XDY
Brand Name	plantonix
Customer Reviews	4.7 4.7 out of 5 stars (4,921)
Global Trade Identification Number	00757440892114
Item Type Name	Coco Bliss
Item Weight	10 Pounds
Manufacturer	Plantonix LLC
Manufacturer Part Number	COCO-1
Model Number	Coco Bliss- 10
Style Name	Block,Coco Coir,Potting
UPC	757440892114
Unit Count	160 Grams
Volume	15 Gallons

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