thank you, shes so tiny just a bud on a stick lol.
how long should i wait?
Like earlier posts, depends on the effect you want. I see a lot of cloudy trichs, in which case I usually harvest. But also I se the bit of tip burn she has. How long has it been getting plain water, if it has been getting it at all. That's a factor for me.
Sometimes I mess up and feed a plant a week longer than I should(perpetual, multiple start dates+ getting high results in a mistake every now and then). Even if the plant is at the normal harvest window I use, I still "flush" for a week, just to help with the quality of the finished product.