Yellowing plants

**bigbagofstinky** · 06-02-17, 07:37 PM

So, I'm a week into 12/12 and my plants have been steadily yellowing for the last 2 or 3 weeks.

I'm in soil and normally alternate between feed / water / feed / water etc.

Thinking this was a case of the plants needing more food I've just gone with feed for the last few waterings (albeit at a half dose).

They haven't picked up or returned green, should I go with more feed still? I've just switched to flower feed but I could add a small amount of veg feed (nitrogen) in there too?

This is my 4th grow of the same strain (Incredible Bulk) and I'm using the same nutrients (Hesi) as normal so I'm surprised to find they're needing more than usual.

Other than the yellowing they seem fine, no blotches / spots etc.

Will try and get a photo up shortly.

**bigbagofstinky** · 07-02-17, 01:09 AM

Looks like nitrogen deficiency and possibly cal-mag too? It doesn't actually look too bad in this photo, but it's worse IRL.

**bigbagofstinky** · 07-02-17, 05:53 PM

Will go with half strength veg (nitrogen) feed and half strength flower feed later I think, I'm conscious they've not had any plain water for a while but I don't want the yellowing to get worse.

Viz · 07-02-17, 06:14 PM

Hello mate, are you reusing your soil from a previous grow?

The Aspie Toker · 07-02-17, 06:55 PM

Nitrogen deficiency starts from the bottom of the plant, and works its way up.

**bigbagofstinky** · 07-02-17, 07:11 PM

Originally Posted by Viz

Hello mate, are you reusing your soil from a previous grow?

No mate, fresh Dutch Pro Lightmix. Again, used this for the last 3 grows with no problem.

Viz · 07-02-17, 07:17 PM

A spray with some Cal/mag will not do them any harm. I am not sure about the alternating water and feed routine but each to their own and if it works why change it.

**bigbagofstinky** · 07-02-17, 07:39 PM

Will pick some cal-mag up then, can I go with any brand? Don't think Hesi make any.

Re upping feed, don't think they need more as I've noticed slightly burnt tips from the last half strength flower feed. Might just add some nitrogen in with it and see if that makes a difference.

Viz · 07-02-17, 08:17 PM

Yeah in soil I found that less was more for my girls. Any brand of cal/mag. I use the Old Timers Cal Mag, but Canna make one that is good.

**Trex** · 14-02-17, 09:28 PM

From the pic ,that looks quite healthy to me .

Calcium defficiency starts with small rust spots on leaves .

Mag defficiency start with yellowing of lower leaves ,then sunken patches occur and leaf gets crispy and dies .

I see none of that here unless my eyes are playing tricks Hehe