Brown/rust spots on edges/tips

possibly Ca def or mayabe K deficiency.. depends on how it progresses. But, based on what i read in most recent week of diary, it's possible your watering habits are at fault here. Light mix is a very weak charge of nutrients and you need to treat it like an inert soilless context before long, especially ~40 days into it. I would ensure 10% runoff each irrigation once you start providing 100% of nutritional need through fertigation. it's not this clear cut, so take these numbers loosely... There are other interactions that impact exactly where a concentration level should be... how much Ca might impace how much K you need in order for the roots to have appropriate access to each without locking one or the other out etc.. (see mulder's chart for these relationships, i just made that up as an example.. Ca will fuck with other stuff before other stuff fucks with Ca more times than not). Use an onlinen app and tally up all your fertilizer that adds K and Ca in PPM. K - 180ppm -- Way over? potential lockout... way under, potential deficiency. Ca - 100ppm or more Again, some 10-20% differene may not be an issue.. lots of moving variables here as to what each should rest at for a particular life stage. For reference this is what i shoot for N 120-130 P 40-60 K 180-190 Ca 100+ Mg 75ish S 100ish In flower my N drops to 80-100 but the rest stays the same. Not 'my' formula. A common formula used by several different brands becaue it's based on same underlying research / reasoning.

P,K deficiency... increase ur feeding by 30%

Hi, does the fan standing on the floor move or does it blow constantly in the same direction? If it is a standard fan and there is no oscillation/movement, it could also be a wind burn. However, remote diagnoses are always difficult. I wish you the best. Basically, I would say that if your plants look healthy and it doesn't get any worse, everything will be fine in the end.

CalMag issues, rust spots or rusting of the edge of leaves inward. I’ve been seeing a lot of these in “questions”. Too much K (potassium) will cause CalMag LOCKOUT! I know everyone wants huge buds, but don’t force something that’s not there. I haven’t read the diary or your feeding to know if that’s the issue, but a lot of ones I’ve been reading I’m pretty sure is the issue. If it’s plant burn, then it’ll be the tops or look like it’s localized unless you’re absolutely frying your plants. Also another thing, if using tap water you need to know what your heavy on(usually it’s cal) but if adding nutrients to tap water such as CalMag you could be supplying too much and that will cause lockout as well. If using RO don’t stick to that 3/4 feed.. give them the normal dose. If using tap water you need to find out how they treat your water and whether it’s soft or hard. Just my two cents.. hope it helps! Also just another quick tip, not all cities use chlorine, some use chloramine! Which is worse and harsh to plants. Are you using tap with this plant ;)