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I think I've worked out what was causing the issue. I think I was feeding them too often and I stupidly misted them with water lightly when the lights were on, so I think that's burnt them. No further yellowing is occurring so hopefully all good :)

When they were in veg, I fed them much less often, but I fed more and more during flower as I was worried about the slow production of buds. The Jack Herer looks great (except for a few yellowing leaves), so I think the slow budding of the widows must be genetic as they both look the same as...

I started foliar feeding when the yellowing appeared as I panicked and thought it was a nutrient deficiency. My temps are around 25 degrees Celsius and humidity is between 35 and 42 percent. I moved the light up as far as it would go last night in case it is light burn, but I don't see how...

Hmm, maybe it is nutrient burn. Would a flush of the pots hurt them at this late stage, as I'll want to flush for at least a week before harvest?

Thanks chaps, I'm growing in Biobizz all mix, watering about every 3 days. I use two litres of water for each watering, and the pots are 12 litre capacity. I've been feeding them twice then using plain water then back to feeding again. I started by giving half of the recommended nutes and now...

The yellowing has got worse after watering with nutrients. I gave Epsom salt to the largest widow last night and foliar fed them all with bloom nutrients, some PK boost and Epsom salt 30 minutes before lights on last night. The runoff PH is still perfect so it can't be a lock out. I'll get...

Here she is

I've been using Tesco bottled water for the whole grow, which is Ph 6.2. I've checked the run off after watering and (although it's not the most accurate method) the litmus paper test is exactly the same colour as the water in the bottle :) I'll get some Epsom salt and use that for tonight's...

Thanks guys! Quick question. If they don't require more nitrogen, is it ok to give bloom nutes (NPK 5-5-10) or should I just use PK boost (PK 13-14)? I've also got some calmag, so is it worth using that? Thanks :)

Thanks for your replies, both. I'll give them a heavy dose of bloom nutes on the next watering. Here are all 3 of them. The Jack Herer is the front left and the other widow is back left. Vegged for 6 weeks so they're huge!

Hello all, Joined up so I could ask for some advice. I am growing two white widows and one Jack Herer. All three plants are in week 6 of flower and over the last few days I have been seeing yellowing of some of the fan leaves. There are only a few on each plant, but they're all on the larger...