drooping and fading in veg.

[caveman117]

Hi there, I have three plants that are aupposed to go into flower tomorrow but the last couple days they have been somewhat droopy and look to be fading a bit to a much lighter green/yellow.

Light:was t5ho 4x4', rwcently changed to 400w hps. Open reflector.
Ph: 6.5 going in, 5.5 ish coming out.
Temps: 75-82 f
Rh: right aroubd 40

Symptoms have been slowed growth until I switched to 400w, then burst of growth for 2 days now slowed down again. Noticed a slight droopyness to them, not there normal perkyness. They have been deinking water slowly since growth started to slow. And now I'm seeing a fade coming in.

At first I thought it was an n defficiency so I fave them some vwg nutes and no Chang e after that. Then I started thinking of the lack of them drinking water so I thought root rot. I baked somerocks in the oven then pulled on out of its pot and put a layer of rocks on ththe bottom. When I looked at the roots they looked healthy and white on bottom. Not as abundant as I am used to seeing though. There was enough to hold the soil together though without a problem.

Here's a pic of the plants in question (the biggest ones, not the seedlings just to be clear).
So any ideas would be appreciated!'

 

[caveman117]

Well after re reading symptoms of different deficiencies (again! Feel like ive read those pages hundreds of times) I feel like my symptoms may be showing pretty obvious signs of sulpher deficiency (I.e. all over yellowing, skinny stems, and less roots than normal).

The bio thrive grow I have has 1% sulpher in it so I'll probably feed them in a couple days. Would I be better off using something else for sulphur in this situation? Should I be concerned it doesnt say water soluble sulphur or something along those lines? I dont know the properties of sulphur.

Again all thoughts appreciated.

 

[beepotron]

5 billion plants under 1 light... go figure.

 

[caveman117]

All those plants are pretty small. The bigger ones are all under a square foot. And theres 22 of those real small seedlings. Under a 400w hps.
In my expirience this is enough light. For real young veg. But I'll try condensing and putting light closer to see if a bit more intensity to the light theyre getting helps.
Thanks for an idea that I'll test out!


Edit* I base the assumption that its enough light on the fact that ive vegged small plants in similar numbers under a 250w mh.

 

[Semper.Fi]

Light levels are fine for plants that small bro, no biggy . . . . @beepotron has never seen a proper Sea of Green then???

Get your self some human grade Epsom Salts (it disolves easier, finer crumb) . . . . around 16% sulfur and 14% Magnesium, (They are deficient in Mg also) that'll have em revvin' again . . . .I'd go a teaspoon in a gallon


Note, I liked your last post because of your diagnosis

Well after re reading symptoms of different deficiencies (again! Feel like ive read those pages hundreds of times) I feel like my symptoms may be showing pretty obvious signs of sulpher deficiency (I.e. all over yellowing, skinny stems, and less roots than normal).

The bio thrive grow I have has 1% sulpher in it so I'll probably feed them in a couple days. Would I be better off using something else for sulphur in this situation? Should I be concerned it doesnt say water soluble sulphur or something along those lines? I dont know the properties of sulphur.

Again all thoughts appreciated.

~_

 

[Semper.Fi]

What sort of base water are you using? Tap/Ro/Well ?




~_

 

[caveman117]

I'm using well water that has three grains of hardness and is somrwhat high in manganeese.

Thanks for the compliment on the diagnosis. Ive read that sulphur gets locked out around 5.5 and thats aroynd my runoff after puttingin phed water sso I may up my ph solution just a tad too.