When would you suggest, I introduce Canna PK 13/14...

Hi @BudHaks! What a nice bush you got there! You can keep your relative humidity up to 55% for 2 to 3 weeks but you will need to find a way to decrease to 40-50% to prevent mold formation on buds. It’s best to slightly lower temperatures during the flowering stage, this will help in terpenes & resin production, 20-26 C° is the optimal range for flowering plants. Now about Canna PK 13/14, go for it, your plant will need P+K in the next days but also a slight dose of Nitrogen during the stretch. As long as you don't exceed 50% of what's written on the manufacturer's schedule you should be fine, remember autos are fragile and it's better to fix a deficiency than to [try to] get out of a toxicity. Hope this will help, keep us up-to-date and happy growing! 👊