whats going on here then?

[bhuda-master]

have been growing 2 green spirits and 1 mango plant for 6 weeks, have been having problems with leaves turning yellow then brown and crispy and falling off. i have lost most of the fan leaves.
im growing in canna coco, under 400whps lamp being fed ionic growth at a rate of 7mls per litre, watering every two days and feeding once a week.
the soil ph is 6.5 and the nutes im feeding them are at ph 6.0,
i have given them a misting of canna magnesium, 1ml per litre, 1 week ago the colour started to come back but now i have leaves curling to the sides and still some yellow leaves,

also my stems have started turning a purple colour that has spread to the smaller stems and into the underside of the leaves,

any help would be appreciated,
bhudamaster

 

[sproutco]

 

[stretchpuppy]

If I were you I would flush flush flush, then at my next feed go 50% and see how they respond. Wish I had a better answer for you, but keep it simple.

Trim off all that dead crap. It has the potential to mold on you.

Are those coco specific nutes?

 

[sproutco]

Its a full blown case of copper deficiency so you use a copper containing fungicide like bordeaux.

 

[stretchpuppy]

I looked up those nutes... seems Ionic makes a soil and coco specific nutrient.

"To use, add Ionic to tap water at the rate of 5 mls per liter or 4 teaspoons per gallon."

You're feeding 2ml over per liter, than the recommended 100% strength on the bottle.

Something to consider and may or may not even be related.

I'm a fan of continuous light feedings rather than feed, water, water, feed again. Seems so harsh that way.

 

[stretchpuppy]

If it is a copper deficiency, which I'm not saying It's not, there is a reason it went deficient. You need to find out WHY they went deficient in the first place and fix it. One guess from doing a quick search on Ionic, is you're not using the correct formula for coco (using the soil feed in coco?), and/or you're feeding way too strong and it's causing problems/lockouts.

Dumping fungicide is putting a bandaid on a bandaid... and not solving the problem, IMO. It may work once, but if the feed keeps going in wrong it will always turn out wrong.

Just throwing a couple thoughts out there. I'm not a coco expert and it's slightly different than my normal mediums.

 

[sproutco]

Too much nitrogen with a high ph

 

[guineapig]

Yes find a coco-specific fert for sure.....but could this problem be solved with a healthy dose of Micro-nutrients (either GH or SaferGro or Genesis' Mineral Matrix)?

This is one of the few times in which i have seen such a clear-cut case of a micronutrient deficiency. Copper seems to be the culprit......does everyone think so too?

Oh, by the way, what is with that bud on the end kinda poking out of the pot.....?
It looks rather large!!!

 

[sproutco]

Those are some pretty big pots. Are you sure they need watering every other day?

If you water with 6.0 ph and the soil tests 6.5, there are carbonates in your water. You might try watering with ph 5.5 and hope it drifts only up to ph 6.

If you need an acid I suggest sulfuric acid or battery acid from the auto parts store. See below in my signature "how to make your own ph up and down"

The purple color starting may be phosphorus deficiency. This would go along with a high ph.

 

[inflorescence]

Oh, by the way, what is with that bud on the end kinda poking out of the pot.....?
It looks rather large!!!

Word. Maybe I'm seeing things, but if you grew that bud like that, i say scap the other plants and just do a SOG of that.

 

[bhuda-master]

cheers for all the feedback, so what your saying i need to do is;
firstly, flush out coco
reduce the amount of nutes
( they aren't coco specific, it was what i was sent as a package deal with the coco, so i assumed ( wrongly) they would be ok)
lower the ph of my water and nutes to about 5.5ph
add some copper fungicide.

sorry for repeating all that just want to be sure in my own mind!

ps that large bud in the corner is my lowryder! i know they get a bad rep but they really are great little things, take all sorts of abuse and still finsh whilst everything else is vegging!

thankyou for all your help so far, it really is appreciated!

bhuda master

 

[sproutco]

Sounds good. Spray with copper fungicide...don't add it to your fert water. Get bordeaux fungicide. Use a low rate because copper is easily toxic. Be sure to report what happens after a few days after spraying. Make sure to let the pots dry out well between waterings.

 

[bhuda-master]

thank you so much for your help and advice, have got some on order with some ph down too, will repost as soon as ive applied the treatment,
once again, much respect!
bhuda master.

 

[sproutco]

You might want to apply a high phosphorus fertilizer once or twice. Something intended for bloom.

 

[bhuda-master]

cheers for all your advice, my mango and green spirits seem to have come back to life again, i only flushed them, gave them two foliar feeds of mg and one foliar feed of phosporus, cut down on the nutes and dropped the ph to around 5.5/5.8 and they have come back lovely and green, i managed to get hold of the bordeaux mix but haven't got round to using it yet, i thought i'd hold off till im sure its needed. i'll post some more pictures after the weekend, im two weeks into flowering and have got first signs of flowering, this could still work out!!
bhuda master

 

[dre86]

Word. Maybe I'm seeing things, but if you grew that bud like that, i say scap the other plants and just do a SOG of that.

fuck yes...Is that Lowryder v2??

 

[bhuda-master]

hello dre86, its not lowryder v2, its just plain ol lowryder 1, it was a cracking smoke and turned a lovely purple colour too!
a sog of it would be good im just looking to get a good yield for self sufficency of the other plants, you cant clone from lowryder (yet!) so a sog would just require me to keep popping beans!
i throw a couple into my veg room just so ive got a bit to smoke whilst the others come on.
bhuda master.