Two different problems!

[leftright]

Hi, I've got some Euforia (Dutch Passion) plants but in the last day or two the leaf tips have begun to severely dip and/or yellow and in a couple of cases the tip looks like its about to shrivel to nothing and fall off.
They are in BioBizz LiteMix soil and have been fed with 2ml per litre water BioGrow. These plants are over a month old and I was about to flower them but I'm a bit worried about them now. Any ideas?










Problem 2: After transplanting a batch of slightly younger Euforia yesterday I noticed today on one of them that the newest leaves were shrivelling up but also turned white. Possibly a fungus? She was placed quite close to a humidifier I'm using. She's on her own now away from the others just in case.

 

[marijuanamat]

Ease back on the grow to 1ml per liter or start feeding them every other watering and see how things go.
Stop using the humidifier as that could easily be the cause of the second problem.
I've found that the drier the air the better results i get.In veg its 40%-50%RH and in bloom i like to get it below 30%RH as it seems to help the plant produce more trichomes and totally get rid of any risk of budrot.

 

[leftright]

I'll cut back on the feed so and see how it goes.
The hygrometer only begins reading when humidity is above 20%RH. Nothing was reading until I put the humidifier in there! They're in veg now and during the day it was usually reading in the 50-60 mark.
So will I just cut off the affected area and put her back in there?
Thanks + Happy New Year!

 

[mexilandrace]

don't cut off the affected area, let the damage progess on those leaves till the plant decides it wants the leaves gone.

if you got a rash on your arm would you cut your arm off?

 

[Weedninja]

Good advice so far. A few of those pics are showing a calcium deficiency(the brown specks and margin necrosis).

 

[tree&leaf]

First up, Biobizz Light Mix is only intended for seedlings.

It's what it says on the bag - it's light in nutrients, so it's no wonder you're having to feed them in veg and surprising people are telling you to stop. The first pic in your thread is N deficient and that's a direct result of the light nutrient soil you have - you need to transplant them into some richer soil for flowering like Biobizz Allmix. You also have other deficiencies starting, probably due to either the light soil, the water or a mxture of both not having sufficient nutrients.

Do not flower them in the pots they're currently in, they won't last a quarter of the way. Repot them into slightly larger pots with a fresh set of rich soil capable of sustaining nutrient requirements for as much of the flowering time as possible. Also let them settle into and root out those bigger pots for about a week or so before going 12/12.

 

[leftright]

Hi, I watered them with 1 ml per litre BioBizz BioGrow 2 days ago (before I saw your post tree&leaf) and now a lot of the younger leaf tips are beginning to yellow. The bigger older leaves seem to be about the same at the moment. My batteries are dead so will post some pics when they is charged.
I appreciate all the replies but I'm getting some conflicting suggestions here...

 

[mexilandrace]

I don't see a N deficiency, in any of your pictures.

I do see a possible calcium problem, what kinda water are you using? and I don't know anything about that soil, does it have lime in it? and if not are you using cal-mag?

 

[tree&leaf]

Hi, I watered them with 1 ml per litre BioBizz BioGrow 2 days ago (before I saw your post tree&leaf) and now a lot of the younger leaf tips are beginning to yellow.

Repot them as I suggested - it'll cure all your problems. BBizz Lite Mix just doesn't have sufficient quantities of nutrients in it to sustain vegging plants - it's intended solely for seedlings and cuttings.

 

[leftright]

Here's a pic of the new leaves' tip yellowing:



@ mexilandrace The tap water has a high PH so I treat it with "PH Down" to get it to around 6.5 Not using cal-mag (don't know if the Light-Mix has lime in it - doesn't say so anyway)

@tree&leaf Yeah, have a feeding schedule from BioBizz showing light-mix being used all the way to the end but with increases in the amount of BioGrow used. With work I won't get a chance to get the supplies to repot until later in the week but will let you know when I do.

Anyone else want to throw in their ?

P.S. Being looking for threads on repotting advice, anyone know of any?
Edit: Scratch that P.S. Just had to use the Advanced search! D'oh!

 

[overmind1632]

Based on the pictures with your tips yellowing, it looks like classic over fert burn, you need to flush your soil to remove excess nutes

The first picture (problem 1) looks like pH problems