8 weeks from seed and yellowing at the bottom!

Hey peeps

Having some issues with my autopot grow that I'm not sure how to fix given all the plants are on the same feed/EC I have 4 watermelon zkittles that have vegged out fine but now I'm having flowering problems, the lower leaves on 3 of them are yellowing rapidly and googling the problem it could be a number of things. Any ideas?

I’ve only used soil. It looks underfed.

Fallguy111 said:

I’ve only used soil. It looks underfed.

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They're in soil (canna terra pro) I thought that too, that it was underfed but I have one of the same strain right next to it that doesn't have this problem.... I'm starting to regret buying this autopot system, I had less problems growing photos in them than I do autos

I’d personally up or keep feeding. I try to keep my tips just burnt. But it is better to underfeed then over feed.

They look hungry, unless they are all clones from 1 plant you will get variations. Other than like a bx or something that’s been worked for a long time

I’d remove some of that lower stuff, yellow or not.

Different plants have different requirements,
Looks like a N def, but you are also close to overfeeding by the looks of it.
Try to raise the N in your feeding but lower total ec when you water.

I’m no expert but that looks to me like the plant is just shedding what she can’t use anymore. Like defoliating herself a little on the bottom where the energy isn’t worth the fight anymore. I’d be way more concerned if that issue comes up the plant.

Immobile nutrients check your PH ensure it in the correct range 5.8-7.
If the PH is in range then it looks like Nitrogen deficiency or possibly Iron deficiency.

I dunno...looks like a plant in flower sending it's energy to the tops and discarding the OLDEST fan leaves...ala a natural process, IMO.

I wouldn't do shit. your plants look great. Just pluck any yellow off and roll.....

Some leafs look like a mg deficit google it
If i could guess you are using a strong led lamp

What have you been feeding? It looks like a lack of nitrogen issue (a-chlorotic/fading leaves starting from bottom and working up) and also magnesium (the patterning). Plants still need nitrogen through the first few weeks of flower - for that last push of growth in stretch. A lot of feed regiments completely cut it out right at transition, which has always given me issues when I was using bottled feeds - leading to starving plants that start to eat themselves in week 5/6.

Unless you’ve locked out from high ppm feed (in that case, flush and re-feed with a balanced NPK feed at about 1/2 strength), I’d feed more - like half veg and half bloom nutes combined.

Looks like low Nitrogen to me but also showing signs of nute burn. Had a friend with the same auto pots and he had problems with salt build up. Not sure what the fix would be.

Stiickygreen said:

I dunno...looks like a plant in flower sending it's energy to the tops and discarding the OLDEST fan leaves...ala a natural process, IMO.

I wouldn't do shit. your plants look great. Just pluck any yellow off and roll.....

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Healthy plants don't shed leafs like that. That is a classic symptom of nitrogen deficiency where it is translocated from the lower leafs to the growing tips.
If enough nitrogen was available it would not sacrifice the leafs.