Hi all,
First-time grower and first-time poster here.
I’ve got a bit of a problem on my hands and am hoping some of you may be able to give me a bit of a steer.
Here’s the details:
Growing Medium: Soil
Strain: Super Silver Haze
Photo or Auto: Photo
Plant age: 10
Quantity: 5
Indoor/Outdoor: Indoor on poor weather days and outdoor on good weather days (1-10 weeks) and outdoor (after 10 weeks) (I switched to fully outdoor because of some mold/mildew problems and plants outgrowing indoor growing area)
Location: UK
Nutrients: Vitalink Bat Guano (5-10 weeks); Formulex (after ten weeks; only one feed this morning)
Light schedule: 16-8 (1-10 weeks); outdoors (after 10 weeks)
They were coming along very nicely until about 5 weeks old. At this point the new growth became a lighter, lime green colour. As a first-time grower wary of over-watering and over-feeding, I held off with the nutrients as long as possible. I took this as my sign to start feeding with diluted guano. For the first 2-3 weeks of this feeding regime, they responded well and the new growth grew every-so-steadily darker (though never completely). Approximately 2 weeks ago (8 weeks since germination), though, the new growth started growing quite light again. Here they are two weeks ago (8 weeks after germination) when the new growth started turning lighter again.
At around the same time, I started getting some leaf septoria and mildew on a handful of leaves. I initially removed the affected leaves but once it spread to too many leaves (one week ago/9 weeks since germination) I give it a spray of neem oil, baking soda, soap and water in order to keep the septoria and mildew at bay. A day or two after I sprayed them with the neem oil, I started to get some hairy white mold growth on the top of the soil. I carefully scrapped it off and then gave a slight spray of white vinegar and water over the top. After two days, it’s returned and I’ve done the same again but removed the top half inch of soil and replaced it with fresh soil this time.
Whilst the mold/mildew is a problem in itself, I hope that I’ve got that one covered with the neem oil and moving them outside. The real problem is the potential deficiency I have on my hands: like I said, the newer growth started turning light/lime green again about 2-3 ago, and over the past week it’s become increasingly worse with the leaves starting to curl and develop yellow/brown patches.
It will only let me insert 5 pics so I'll post some more below.
Anyway, I’ve tried to identify the problem myself and it seems like it could be anything! It seems to be most likely a potassium and/or phosphorous deficiency. However, a lot of the info I’m finding online is contradictory: some places suggest I have not enough potassium and/or phosphorous; whereas other places suggest I may have too much! In any case, I could really do with some more experienced eyes taking a look at the pics I have and giving me a steer on what the problem is and what I should be doing to remedy it.
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