Burned leaf tips

i would feed your nutrients at half the dose your currently working with. its way easier to feed excess than to underfeed nutrients.

Slight burning from "hot" soil mix, not a deficiency of any sort. Make sure you are getting run off each time you irrigate, it is vital for soil and plant health and will help prevent problems. No need to do anything at this stage, it will sort itself out gradually and your plant will grow just fine. Go easy on the ferts when you decide to start feeding, begin with half strength and see how that goes. Remember, it is very easy to fix a slightly under fed plant, but very, very hard to rescue a burned and damaged over fed plant!

In my opinion, the plants do not look like potassium deficiency. I don't see any yellowing leaves in the lower part of the plant, this is normally caused by ageing or a lack of potassium. Here, however, it looks to me more like a slight over-fertilization as only the tips are burnt but the plant is still deep green. Are you using mineral fertilizer? If so, your dosage may be too high. The EC value of your soil also has an influence here. Don't start with the information in the fertilization schemes from the beginning, but perhaps with 50% and work your way up in 10% steps. I would water at least the next two waterings without fertilizer and observe the plant. Happy growing!

Its a slight imbalance somewhere its quite normal actully. they will sort themselves out dont worry ph fluctuation is probably the cause but it could also be a very slight imbalance in your nutrients. I get burnt tips if i mix my nutrients slightly wrong. best of luck anyway buddy im sure she will power through.

Is the soil new ? My guess it's too fertilized hence the burning tips. But I wouldn't worry she will outgrow it.

This is root zone Problem I don't like air bags problems with them as I think they dry out to much and no good air killing roots all time so I gone back to plastic pots with large drain holes it's definitely root to dry