dinafem haze xxl leaves yellowing and bottom leaves dying , help!!

[sam2016]

hi guys I'm hoping someone can help me , these are my haze xxl autos at day 35 , I'm growing in plagron light soil with perlite mixed in , I'm using plagron alga grow and sugar royale nutes , ive also got plagron alga bloom with I was going to start now shortly , I started them off under a 300 watt dual spec cfl then swithched to a 250watt hps at day 21 , ive a 4" extractor fan and a small fan in the tent circulating air , I'm running a 20/4 light schedual I hadn't thought I'm over feeding but maybe its a defiency I dunno ... , any help would be greatly appreciated . Appologies in advance if I should have made a grow diary but I'm starting to panic now , ive kept a written journal since germination so I can answer any questions regarding feeding etc..

 

[Bunny]

She looks real hungry for N and thirsty. But could be lock out?


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[sam2016]

I don't know , ive been feeding alga grow at 1ml / litre every other feed also sugar royale on the first feed , I planned on giving that once a week

 

[BII]

You appear to not be following instructions well enough.

From what I saw, Plagron alga grow's recommended dosage is 4 mL/L. You've only been giving 1 mL, 1/4 of that, 1/2 of the time - 1/8th recommended dosage (and unstated in this context, you may have started feeding late!). You could well have other deficiencies besides apparent N that just haven't made themselves evident yet. Maybe, try 2 mL/L and see how it goes, and keep upping the amount, particularly in bloom, until you see indications of nute burn or excesses, then back-off some.

Sugar Royale is just a growth stimulator, not real nutrients, other than a load of N. And the instructions I saw stated, "Administer this nutrient solution once a week during the flowering phase," so why you've supplemented your vegetative feed with this is a good question.

Otherwise, Sugar Royale at 9-0-0 this seems way too much N to be adding during bloom. Even though the stuff is made for bloom, I'd avoid it. I even avoid cal-mag over 1-0-0 during bloom.

 

[sam2016]

thanks bill , I only used that amount of grow because I read in a few places to start off on 1/4 strength nutes and build up slowly , I will add 2ml per litre from tomorrow and see what happens

 

[Heavily Medicated]

You have multiple def symptoms manifesting here. My bet is your medium pH has you going into lock out. Do you have a reliable medium pH probe such as an Accurate 8? Have you been pHing your water/feeds? Also, what are your temps and humidity?

 

[sam2016]

hi hm , thanks for ur reply , no I don't have any ph readers , ill have to get one . my temperature with light on is 24C and around 55 - 60% humidity , drops to about 19c with light off and humidity goes to around 72%

 

[Heavily Medicated]

Humidity may be a little high for flowering, don't want your buds to get rot. There are some things we can do to help if medium pH is a problem. You need to at least try this runoff method of determining medium pH. It is a rough stab at best, but better than no idea at all. https://www.autoflower.org/threads/...-for-run-off-testing-and-ph-estimation.41733/

 

[DABaracuss]

looks like she needs some cal/mag and some food.DO you have cl/mg. Most new grower problems are ..over or under .feeding watering or a combo of both.

 

[sam2016]

thanks everyone , I flushed both plants this evening as I cant get to the growshop till Saturday to get ph testing equipment , should I just try giving bloom nutrients on Friday when watering is due again , or wait until I can determine ph levels and go from there ?