Flowering Female

My buddy has a female mid-flowering that is only about 18 inches tall, I know a small guy right. The calyx are begining to turn a copper color even thought no buds have flowered. He wanted to know if he should trim some leaves to produce more or if he should harvest soon.

Thanks in advance

Didnt you just post in another thread about male preflowers?

He shouldnt chop any leaves ever. Chopping leaves to increase bud production is stupid. Also, how can it have calyx's but no buds? I mean what are you going to harvest?