Hi there,

I've got three ladies (See the pics.)

Strain is uncertain, outdoor (balcony) soil growing, pH is normal, water is ok. Weather was very unstable this summer and the temperature goes down to even 10 degrees C at nights. (Should I take them inside at nights?) So they're not as big as they would probably be, but I'm alright with that. (It's my first grow.)

They're born in late may and now is their (around) 4th week of flowering. I probably have at least a month before harvest.

The main problem is with the one in the middle. (Leaf pics are of this plant.) There are necrotic brown spots appearing and then getting bigger and bigger, eventually killing that leaf. This happens mostly on fan leaves, but smaller leaves are affected as well.

Could this be manganese deficiency?

There are some pigeons living high in my balcony, so I first thought that maybe some chemicals mixed into the rain water dripping on the plants might be causing this problem, but only one of them is affected so I eliminated this option.

The interesting thing is that all three of them look like the same strain, receiving the same treatment, water and fertilizer. Fertilizer is high in P and a little higher in K, but I use it in small amounts, just to help the ladies a bit.

I noticed that lower leaves are turning yellow in all three plants, but this may be normal since lower leaves tends to die off towards the end of flowering period. Any other views?

Anyway,

Any ideas on what's going on?

Thanks.

E.

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