Yellow Spots on Leaves During Early to Mid Bloom

You need to up your calmsg pal. As its too late to use a spray. I suggest all feeds, water, npk, EVERYTHING. Be in an optimal ph range. And try keep all feeds in the same range. As it helps overall.

Looks like she was lacking some cal mag to me

It seems that your plant is blooming fast and strong, and will need constant supply of blooming nutrients (little at a time, but more often). I'd maybe adjust pH a tiny bit between 5.5-6.0 and hopefully the pH at different level will aid your plant uptake more diverse micro nutrients required for the flowers. I think you have a good system in place already and the plant looks good, probably just need to find the right sweep spot for this fast blooming week.

Checked your diary for more information about the nutrition. Generally speaking that should be fine. Regarding her age (~5th week of flowering) thats the stage when the buds should be swelling and therefore nutrition ratios needs to be ”correct”. I'd say there is excess of something, most likely excess K (Potassium) blocking Magnesium uptake. And the foliar symptoms indeed looks like a Magnesium deficiency. Another thing noticed your day and night temp is both 26C? That might affect on chlorophyll production and that also might affect on Magnesium uptake. These _should_ fix the issue: • get about 5C degree drop difference in night time temp (26C day / 20-21C night) • run about 250-350ppm solution of CalMag through the system and pots (kinda like flushing) in case there is any excess salts creating antagonism. • Cut down for bit on the Potassium feed (usually bloom booster contain large amounts of Potassium) • Fastest cure to prevent further foliar Mg def symptoms is to feed them Epsom salt. If you need more help for example creating balanced nutrition for the ripen phase - feel fre to DM me.

I would be tempted to run water through and check the ph of the runoff. Chances are you have a lock out as your using the correct nutrients it may be the ph.

Looks like nutrient lock out to me bud! Flush her through and Feed her calmag for 2 feeds and then should be fixed!

After going and looking. That is the problem, why the bud development has slowed to a halt, your plant is in need of something (Maganese imo) or has too much of something(Phosphorus)preventig it from uptaking what it should. *coco is known to hold Phosphorus.

From the looks, it looks to be late stage manganese deficiency, or possibly Phosphorus excess. You are in late flower, so these signs start to appear pretty rapidly, as the plant is using all its stored energy in the leaves. Are you already flushing?