Help needed!

Have been growing some cheese, buzzberry and papaya.

Vegged plants for three weeks under 400W MH, then put on to flower under 400w HPS dual spectrum bulb.
Had no problems during vegging period, or for the first five weeks of flowering. Conditions were;

Temps: 70-75F.
Humidity: 60-65%.
Soil: Plagron Bat Mix Special.
Water: Hard water area, so nutes to match; currently 1.5L/2 days.
Additives: Cannazym 2ml/L, root juice 1ml/L, superthrive 1 drop/L.
Foliar feed: 2 during vegging period.
Nutes: NONE.

Because I did not use any nutes at all for vegging for first five weeks of flower, I decided to give the plants their first feed during the sixth week.
As a result added;

Big Bud 5ml/L, PK 13/14 1.5ml/L, terra flores 5ml/L.

Only added nutes for 1 feed, but soon started to get trouble with the plants.

Started by sending leaves yellow and droopy, and others yellow and light green with brown and black dried patches. Pics below.

Personally, think that the soil was of such good quality it was not necessary for me to add any nutes at all, and all I think I have achieved is to give them nute burn.

That, or they have either an N or a P deficiency.

The Cheese and the Buzzberry do not have the symptoms as bad as the Papaya, which is the plant pictured.

Any help will be much appreciated - do not want to lose them this close to harvest, and certainly do not want to resort to flushing at any cost - as in my experience flushing the soil to leach nutes creates too many other problems, and usually results in the plants going in to shock.

peace and love

bump - anybody?

They look hungry to me. I think you have to feed them.

Nute burn has a much more burnt look to it, more acute than hunger- which is more washed out and tired looking - the all over yellow like you see.

The other option is that they have enough food, but can't use it because of nutrient lock out caused by an f-ed up ph. Do you ph your water? I'm leaning towards underfeeding though.

Picasso345 said:

They look hungry to me. I think you have to feed them.

Nute burn has a much more burnt look to it, more acute than hunger- which is more washed out and tired looking - the all over yellow like you see.

The other option is that they have enough food, but can't use it because of nutrient lock out caused by an f-ed up ph. Do you ph your water? I'm leaning towards underfeeding though.

Click to expand...

i was expecting to see burnt looking patches from nute burn after your description. I mean problems starting right after adding nutes seem very suspicious but after seeing the pictures, I'm inclined to agree with Picasso - those leaves look like they need something. if you had been feeding, i would focus on one of the lesser chemicals like zinc or sulfur but i'm wondering if this isn't just a serious nitrogen deficiency.

I am not a soil grower so I'm not real sure how to fix issues like this but as picasso also points out - nutrient deficiencies are often pH problems and not a result of too few available nutrients.

I see that you copied a few folks on your request - so you may want to wait until the pros have a chance to chime in as my experience is limited.

soooooooooooooooo hungry.

thanks gents, input was desperately needed - so much appreciated.

Thanks for answering PMs too guys.

will give them all a good feed tonight before the lights come on.

peace and love.