First indoor grow, second overall

Mg

Hey 👋 I do agree, you are over feeding… I found a page with most popular deficiencies & methods to help… more specific: I guess you are lacking iron due to to much nutrients in your soil. Maybe following link will help: https://sensiseeds.com/de/blog/wie-man-die-sieben-haufigsten-defizite-von-cannabispflanzen-anhand-von-blattsymptomen-erkennt/ Hope this helped 👊🍀

Hey Growmie, From the looks of that new growth turning yellow (starting at the tips and spreading), it seems like you're dealing with a nutrient issue, but not from underfeeding, more likely over-fertilization or a pH imbalance causing nutrient lockout. What’s likely going on: Nutrient Burn: The fact that it got worse after upping the feed is a strong sign you're overfeeding. Burn usually starts at the tips and creeps inward. pH Lockout: If your pH is off (especially too high), your plant can’t absorb key micronutrients like iron or zinc , even if they're present. Iron Deficiency Symptoms: Yellowing new leaves with green veins is classic, and again, often caused by pH issues, not a lack of iron itself. What you should do: Flush with clean, pH-balanced water (6.0–6.5 if you’re in soil) to clear out excess salts. Check your runoff pH if it’s out of range, that’s probably the root cause. Ease off the nutes for a few days and monitor. Next feed, go with 1/4 to 1/2 strength max. Make sure your temps and airflow are on point. Environmental stress can make it worse.You’re doing the right thing by observing and adjusting, just gotta dial it in. Keep a close eye on the new growth over the next few days; it’ll tell you if you're back on track. Happy growing!

Oh looks a bit high to me. In combination with purple stems on fan leaves this could be the start of a lock-out. Try to lover your ph a little and see if it gets worse or not. If they start curling up it’s most likely from too much light. Good luck 🍀👍 👊

These are classic burns from excessive fertilizing... as soon as you see that the edges are just starting to turn brown and look burned, the plant is warning you that you have given it a little more food than it needs.. yours showed this a week ago, probably, but you probably didn't pay attention, in the beginning they don't get so burned.. in such situations, you don't feed until the next two waterings, and later you just reduce dose of fertilizer and feed every second or third watering. This is not something that should worry you, at least I wouldn't, throw out the food for the next two waterings and watch how the plant behaves, that way you won't be able to harm it any more, and if there is a defect or something like that, it will continue to spread and show, which you can fix at any time... this is not locking, if it was locking your plants would be on the edge of life and death and they wouldn't look anything like this.

Remember,..... what is showing in the leaves now is a direct reflection of what was happening in the root zone 2-3 weeks ago. Brown tips usually indicate burning from over feeding, but can also indicate a build up of nutrient salts in the substrate due to not getting sufficient run off each and every time you irrigate or feed. Since the plants are getting close to the end of their flowering cycles, there is little you can do to "fix" anything before harvest.....salt build ups are happening from the first feed and take weeks to rise to damaging levels, you can not cure it in 1-2 days. "Flushing" is not something I would recommend, it just releases even more salts and makes things worse. I would suggest reducing the fertilizers slightly and making sure you are getting a decent amount of run off when you are giving plain water. In soil, a schedule of plain water/plain water/fertilizer works well, you should never fertilize every time you water! Some people like doing plain water/fertilizer/plain water/fertilizer, but reduce the strength of the fertilizer if feeding that often. This is not a "lock-out" issue in any way.

agreed with einamio

I personally start counting flower phase when pistils appear, in my experience it takes about two weeks after switching to 12/12

Hi 🙋‍♂️ I don't start counting from the first appearance of the female traits. Instead, I wait until I recognize the first true flowers. After that, I go by the flowering times of the manufacturers... Although the seeds to harvest time usually doesn't match up anymore, the flowering times are mostly spot on... but everyone has to figure that out for themselves. Hope it helps! Good luck 👊🍀🖖