What's wrong with my plants? (Yellowing Leaves in Flower)

[RenaissanceBrah]

Growing Strawberry Cough indoors under LEDs. Pretty warm where I live.

Currently in Flower.

Do you guys think this could have been caused by lack of water, or too much heat?

Wondering what the culprit is. Thanks for any suggestions.

 

[green-genes77]

Honestly looks about right to me, maybe a little bit N deficient but not really for the point of flowering she's in IMO. Did it start from the bottom? Has it been gradual? This is likely nothing to worry about and a sign that the plant is wrapping things up. If your N source is inorganic, increased temps will cause it to be taken up faster, this could have played a role as well. You could supplement N at this point without it being too detrimental to the finished product but I personally wouldn't.

It looks like you could be overwatering a bit too, but again I wouldn't sweat it too much.

 

[Creeperpark]

The nutrients are starting to be depleted in the container so the plant is moving the mobile nutrients from the leaves to where it's needed by the plant. If you are close to finishing flowering, I wouldn't do anything at this point.

 

[f-e]

It's N. N is one of the things that can make a real difference to yield. Another concern is if leaves within the buds start to die, which is just about starting to happen. You don't want weakened tissue within your buds where the RH is very high. It's perfect for mould growth.

If you are using bottled feeds, I would switch back to grow for the next feed. Then some sort of 50/50 mix to maintain more N availability. This is just a rough suggestion though, as I have no idea what you are growing in.

 

[RenaissanceBrah]

It's N. N is one of the things that can make a real difference to yield. Another concern is if leaves within the buds start to die, which is just about starting to happen. You don't want weakened tissue within your buds where the RH is very high. It's perfect for mould growth.

If you are using bottled feeds, I would switch back to grow for the next feed. Then some sort of 50/50 mix to maintain more N availability. This is just a rough suggestion though, as I have no idea what you are growing in.

Thanks f-e, I'm actually growing in super soil from mountainside organicos, it was new soil as well. Watering with RO bottled water.

This strain is Strawberry Cough, so should only need 2 weeks or so more to be done... RH is around 60%.

Anything I can or should do at this point?

 

[f-e]

Two weeks is kinda close. However, I think without some N, it's long enough to become a rot problem, and as they are still filling out, the N will still help yield. I would have to add some.

It will need to be immediately available. So perhaps a grow feed that's multi-purpose, including hydroponic. No N that needs some cycling by the microlife as it will be too late to be of use. I think Urea lives in the middle, having just a couple of days turnover. I'm out of my wheelhouse with organic grows though. We need another opinion. However, how hard is the tap, and do you have nitric acid for pH down? Also what is the runoff pH now, could it be a bit low, which makes the N hard to get?

If the seed pack says 2 more weeks, you may have 3 good weeks, if they have been held back by such issues. Making some extra N a must. As they can't go 3 weeks without any. The risk of mush in the buds is too great.

 

[RenaissanceBrah]

Two weeks is kinda close. However, I think without some N, it's long enough to become a rot problem, and as they are still filling out, the N will still help yield. I would have to add some.

It will need to be immediately available. So perhaps a grow feed that's multi-purpose, including hydroponic. No N that needs some cycling by the microlife as it will be too late to be of use. I think Urea lives in the middle, having just a couple of days turnover. I'm out of my wheelhouse with organic grows though. We need another opinion. However, how hard is the tap, and do you have nitric acid for pH down? Also what is the runoff pH now, could it be a bit low, which makes the N hard to get?

If the seed pack says 2 more weeks, you may have 3 good weeks, if they have been held back by such issues. Making some extra N a must. As they can't go 3 weeks without any. The risk of mush in the buds is too great.

I've always had issues feeding in flower, also heard nitrogen should never be given in flower - are there any certain rules as to what to feed during flower?

I did give some kelp once in flower, and once fish fertilizer, and both times the plant seemed to really suffer from it. Maybe I gave to much, it didn't seem so, but wondering if there are any specific rules for feeding in flower.

 

[StickyBandit]

I usually water with a nutrient mix of about CF 24 on the truncheon if the leaves start to yellow. Disclaimer: I'm not an expert though

 

[f-e]

There is no question that plants use N in flower. Nothing green can be made without it. N demand will be strong through veg and weeks into flower. Excess N will effect K, reducing how much the buds fill. Excess though, so we are talking dark green glossy plants, perhaps with some curling under.

I'm very much a hydro/coco grower. TBH I'm unsure what a super soil is. I have done composts a bit, and Canna Terra many times. It's not really the right experience though.

Are you just using RO and that's it? If so, some general flower food might carry the N you need. They all have some. I had presumed they got flower food, so I suggested grow to get more N, but if they just get water, then simply flower food may carry the N you need. Though, if you just want N, using grow does make more sense. As flower has N content reduced, and P&K increased. Which you are not looking for.

My advice is a half strength grow feed, if you have some. If it's suited to water cultures, it will be available straight away.

N is very easy to wash out of substrates. Soils need to keep making some, or have it supplied. I'm unsure about using RO in terms of the effect a solvent such as RO has on the microlife. Much is at play, like how far the RO penetrates before picking up anything. If really dry, water can skip straight through. If still wet, RO soon gets dirty. However... it's washing the substrate. It's a solvent. Generally it's hardened up with cal&mag which in turn bring N to the mix. Not always, but 95% of cal-mag bottles have more N than Mag. About double.