Question

How do you tell when the plants are ready for harvesting?  

Answer

When the hairs on the buds are about 65-70% red that's the optimal time to harvest for the most potent thc content.

Question

On a few plants some of the original feeder leaves around the base of the plants are starting to yellow ... is this normal?  

Answer

All plants no matter how they are started either from seed or clone will get yellowing on and lose their original feeder leaves.