Hey y’all! First time grower here. I recently bought Royal Queen Seed’s Stress Killer Auto seeds for my first grow and here’s a little background on my grow setup. Artificial LED lights Fabric pot Gardening soil mix (no added nutrients) Mixed with: 30% perlite 10% vermicompost Some mycorrhizae culture Fully organic fertilizers (sesame meal, feather meal, fish bone meal, palm bunch ash, fully fermented compost, humid and fulvic acids) I started off the vegetation cycle with the above mentioned organic fertiliser with a 532 ratio. 16/8 light cycle This is the 5th week since germination and my plant has entered flowering I think. Ever since I noticed the flowering, I fertilised it once with a mix of the 523 ratio nute and 258 nute (both organic), with some blood and bone meal. However I found that some lower leaves are starting yellow and develop brown spots. I’ve trimmed off the yellowed and wilted single true leaves, but they’re starting to spread to the other lower leaves. (Attached photos) In addition, several leaves throughout the plant are developing brown tips. Any ideas as to what’s causing this? I’ve attached pictures to help
I see first stages of Powdery Mildew in one pic. Would like to see a closer up phot both sides of the leafs. Powdery mildew The most common and prolific mold for cannabis is powdery mildew. Powdery mildew It appears on the leaves as a fine white powder that can spread to the rest of your plant, interrupting photosynthesis and causing the leaves of your cannabis plants to turn yellow before eventually falling off. Learn how to get rid of powdery mildew.
If you’re referring to these patches circled here: they’re the residue left behind from me spraying neem oil on the leaves. here are some photos from the bottom of the leaves
I was afraid that I might get mildew or insects due to the wilting leaves so I sprayed her all over as a prophylaxis.
If you don't have insects or PM don't spray the plant when the plant already has issues. All sprays for fighting PM is done by what ever that is being sprayed on it is WET. The white residue on the leaf's is killing them . If you have to spray for insects, and you dont have insects yet spray every where except on the plants . Use sticky traps at the base of the plant , Sticky traps work good for informing you your starting to get certain kind of insects . PM if I dont have PM problem I spray the inside of the grow room/tent walls and floor with a mist of denatured alcohol/water mixed 80/20 . I also a couple pumps of spray in the air but not on the plant or lighting or on electrical anything in the tent/grow room
Try not to spray thit the lights on I have green LEDS running 24/365 in my tents so i can spray at night I don't think we have found the root to the plants problems yet; Cannabis Symptom Checker - Identify Cannabis Leaf Problems (ilovegrowingmarijuana.com)
Whats causing this is the blood and bone meal ...all gardeners young and old always burn their plants with the blood and bone more the blood ...its really really high in (N) The large white pistols tell us its in flower and doing well, Id flush with 3 times the pot volume with air temp ph'ed water do it days end so it drips out over night, no nutes for 2-3 weeks, consider getting a tds tool or ec meter and keep track of the water that drips out after watering good luck
Th Thanks Vee! Got it. Flush it at days end with three times the pot volume. No nutes for three weeks. Test runoff with EC meter.