Yellow around bud area?

[GreenMadMan]

Problem: See picture
-Medium/grow method: R-DWC
-Feed and supplements used: Dutch Pro Autoflowering nutes. CalMag
-Water source: Tap water pH balanced.
-Strain and age: DP Think Different
-Climate: min 19 max 24 Celsius . RH 41%
- Light used: 600 w led
-Additional info: started about two days ago. Was going to start on Bloom nutes this weekend

 

[GreenMadMan]

Sorry also PH set to 5.8 and EC ATM 1.4.

 

[puggle6]

Hmm, your foliage is quite dark but no claw so all good.

It does look quite dramatic though so not sure. Fast growth? Due to start of stretch?

Are you seeing EC drop? They can get quite hungry around this time and can strip nutes at an alarming rate!

f6

 

[GreenMadMan]

Have about a 60L reservoir and in last 3 days they drank about 20L but the EC stayed the same on daily checks. Last res change being last Monday. I moved the light up slightly today as well just in case .

Of the 4 plants I have in the system the largest seems to have very little of this yellowing while the smallest in pretty dramatic like you said.

 

[MedGrower]

Kind of looks like it could be iron deficiency. pH for the proper absorption is in acceptable range and I would imagine your nutes and CM would already have enough iron.

How are the roots holding down there? It may affect the iron intake perhaps? More so I would suspect that you may have too strong feed and this would make it harder for the rootsystem to uptake iron.

 

[Waira]

-- oh yeah, that's Fe defc. starting,.. almost always with this one, it yellows from the "palms" out,... pH seems OK, were there any sudden temporary drifts recently? Med' here knows hydro far better than I do, so definitely a root check is in order,.. Med, the EC that's not out of line fir this stage is it? Ohwait, you say all the plants are showing some sort of symptoms, but this ione is the worst? That's a clue there,... are the nutes in good shape? Have a look, make sure they don't look or smell off somehow, and there's no precipitate on the bottom,... Outside of that, seems her demand for Fe might be simply high,.. I recommend a foliar treatment and additional micro's in the res', with a dedicated micronutrient supplement,... Earth Juice Microblast is a good choice; you'll need a wetting agent for this to be most effective; spray tops and bottoms of leaves!

 

[puggle6]

My experience is 1.4 EC is a little high for hydro/nutes over roots.

1-1.2 is as high I ever get with autos


f6

 

[Waira]

Ah, thanks F6 mate! So, this might be as med mentioned, a competitive uptake issue? might be the nutes are weak on Fe content too,...

 

[GreenMadMan]

Thanks for all the help guys. I added more CalMag, the one I use has Iron, which is about at 1/ml a L and things seem to be alot better. I also started adding some Keep It Clean by Dutch Pro to keep all the nastys out of my Res.