i havent grown them in coco, but I grow them in soil. They are always different so its a little hard to say. ive had 3ft 110day autos, 8 in 45 day auto within the same batch of seeds. they are all so different. Even the strains ive got from amsterdam. Out of 50 autos from the same batch 2-3 will be exactally the same. Try a few in coco and a few in soil, thats what I would do. make sure you rinse the coco before use to leach the salt that might be in there. good luck!!