Lemme think...I'm at Day 68 of flowering...I repotted just after switching (I should have repotted two days before going to flower). I used good new soil, so I could have waited up to three weeks before the first nute in flower, but gave a VERY diluted shot of cactus juice around flower day 7.

Then it was 1/2 strength Cactus Juice every other watering (they get 2 liters every third day, so it was 1/2 strength nutes every 6 days). I've read that Schultz Cactus Juice is recommended at full strength once a week, but it burns pretty easy and I've only used it at 1/2 strength.

Flower Day 56 was the last nute they got. So they were fed during flower 7 times.

I think I did okay with this. The last of the remaining fan leaves are just now being used up for their nutrients and the trichs are 25% clear and 75% cloudy, so they should be finishing in a week or so.