Bend your young plant's stem back and forth to force it to be very thick and strong.
SORRY - NO PIC
Spindly stems can not support heavy flowering growth. An internal oscillating fan will reduce your humidity on the leave's stomata and improve the stem strength as well.
The importance of your internal air circulation can not be stressed enough. It will exercise your plants and make them grow stronger, while reducing many hazards that could ruin your crop.