First grow. Space bucket. Mystic Blue Autoflower....

Hello @Loopie ! You have phosphorus and potassium deficiency. You say that you are using bloom fertilizers. You mean that you are using the PH perfect series from advanced nutrients that i see at your photos or you mean the happy frog fertilizer ? And what do you mean 3 ml/L? Happy frog is a dry fertilizer and it needs to be applied in the soil from the beginning or later as top dress. If you are using the advanced nutrients lots of things could be wrong. PH perfect bloom its not enough by its own. You need to use all the line ( grow,micro,bloom ) because they work cooperatively. Also when using synthetic fertilizers its very important to measure the EC/PPM value. So if you are using the advanced nutrients flush it ( 3 times the size of your pot ) with PH'd water at around 1.4 ms/cm and you will be fine. If you are using the happy frog you may be using to little. You also have to keep in mind that organic dry fertilizers like happy frog needs to decomposed from the soil microbes in order to be available for the plant. So if you are using the happy frog spread a 1/2 cup at your soil around the stem and put on top of it a quality compost or worm castings so the microbes will make it available for the plant and for best results water with aerated compost tea . Happy growing ! 👊

Hi @Loopie! Plant is suffering from a serious nutrients deficiency (Phosphorous, Calcium, Magnesium, Potassium..). My guess is that over-feeding and/or over-watering led to this situation, and now you probably have a nutrients-lockout. Root-bound might be involved too but considering you're growing in 3.5gal containers it's unlikely. Do you check the EC/ppm of your feeding solution? As an emergency move, I would stop nutrients intakes for a few days, water with plain pH'd water (6.0~6.3), remove the most affected leaves, try to follow a dry/wet cycle for the roots, and see how it goes. You may want to stop "Happy Frog All-Purpose" since it contains Nitrogen and you don't need it after the stretch has ended. Hope this will help, keep us up-to-date and happy growing ✊

Good Morning, i wont change something in your Feeding. the Plants Lifecircle is near the End,A few yellowing leaves should not concern you. Your plant need for Flower P+K (in any Blooming Fertiliser) and you already use it. You can give her some carbs whith the waterings ry Blackstrap-molasses or anything similar. The Girls love it.Happy growing.... and a wonderful sunny day

Hello ! According to me you'v got 2 issues on your plant , the 1st is a Potassium deficiency & 2nd you'v got a cal mag issue. According to me the good way to help her is to give her extra Cal Mag and a mid/late bloom nutrients like a PK booster. As the yellowing is touching every leaves from the bottom to the top , I would not bet on a nitrogen deficiency. If you have to change something then add a pk booster to your nutritions schedule. She should be doing that on the very late bloom even during the flush. Hope it will help you 😁👍