Two Crimini Portabella Baby Bella Mushroom Growing Kit by Ma_Mush at Halo Grow Box. Hurry! Limited time offer. Offer valid only while supplies last. The 12'' by 12'' kit offered weighs 12 - 15 lbs and can produce up to 4 lbs of mushrooms during the 6-8 week growing cycle. Once the mushrooms emerge they double in size every 24 hours! So much fun to watch for children as well as adults..
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