@Butrflynet,
I have to agree with Dadpad. Thiose arent brussel sprouts, they look more like collards. Ive heard of mixing seed batches and envelopes before.
Sprouts should be snipped during the mid season, but I dont think youll get any from those plants. HOWEVER, make lemonade , collards cook up real good with some broth made of hamhock and stir in about i large chopped onion that youve fried till clear. (throw the onion , grease and all and 2 hamhocks per big pot. Fill the pot with collard leaf chunks (strip from the center rib or not , some folks like the extyra crunch from the stems).
Its all good, nothins bad from a garden (cept maybe eggplants)