Basil Plants need help?

i got 2 basil plants in 12 oz cups the y seem to be turning yellow on some of th ebigger leaves any ideas what this could be .. i give em 20-20-20 solution every week

how long in the cups ? .. Basil is a fast grower

like 3 weeks should i transplant

Sorry for the late back at ya......... sure transplant to 1 gal , water only for a few days .. then start week miracle grow...... good luck

I've got some Basil growing myself & I don't give them any nutrients. They seem to be O.K. without.

If you grow basil in some compost mixed with mulch or potting soil it will go off. 1/2 gallon container would be fine.

small pots i think is the problem

I just wanted to share some pics. of my basil with you. I have several pants growing in a rather small container & they seem to be fine.