Early yellowing in flower

Hey everyone, Ive been working on breeding autos. Second run with S1 seed and something is off , Im about four weeks in flower and everything is fading rapidly even though buds are young and small. In soil, using Nectar for the Gods and Build a Bloom nutrients , Also compost tea once a week. Ph is around 6.4 going in and runoff is usually pretty close. Day temps around 80 this summer unfortunately , night temp about 75. Any ideas ?

You mentioned runoff measurements, how often are you watering to runoff?

Some of the tips look like she was hit pretty hard with the nutes, new growth looks better. Have you been giving her calcium? Maybe too much? What about the light intensity, are you sure it’s not to much? Also I never water to runoff with organic or measure any parameters. Can be very misleading with organic soil.