новые листья желтеют, а на старых появится пятна и опускаются кончики

canoeing of leaves can be heat stress or too many nutes.. refer to recent behaviour to eliminate least likely. looks like a rootzone issue to me... how are your watering habits? always allow a wet-dry cycle to occur. Wait for top 1" to dry (or better yet learn weight of a dry pot) and when you do irrigate, irrigate with ~20% runoff. this ensure concentrations remain at a happy equilibrium - this will help maintain pH and avoid pests and bad microbial growth too. Re-assess your feed. Use a nute calculator to add up the PPM of what you mix together. Your ferts have guaranteed analysis labels, or they should if they have any integrity. Make sure what you provide isn't out of balance. Check out a "ballpark" idea of PPMs that are safe in any of my diaries. One picture each week shows PPM of my mix. the extra "250" added to total is from my water report and not relevant in most contexts. i have hard water, so the differences there may cause minor differences in what your optimal mix should be... also, each plant will have some minor difference too, but most plants, even across species, typically prefer what you see in my diary (ballark, not exact) You are in soil, so this wold be what you ramp up to when you believe your soil's initial nutrients are now used up and you must provide them in full. 120-130 N 50-60 P 180-200 K mg, s and Ca all depend heavily on your tap water... you can see what i have.. they are still close to other formulas out there from other brands instructions too, not just "Jack's" forgot -- pH ... ensure your pH is 6.5-6.8 in soil. what you put in... the soil should correct itself, but don't push it without reason.. save that for an accidental irrigation that isn't pH'd not every single time. use that feature of soil as a safety net not as SOP.