i believe its 8-12 inches to be planted in ground, give them a root system get them healthy b4 u do any planting in the ground u could end up killin all ur plants by bugs eating the lil ones wait till they are about 6-8 inches thats when i put them in the ground outside, this year im going pots for easy moving last year i had acouple neighbors trying to cut off buds over fence not cool