Lower leaves are burning from their tips

growerboy

growerboy

Active Member
Hello everybody!

I have a clone with the lower leaves burned at their tips.

Here is a pic of the clone 10 days ago:


I've been in holidays, and my partner gave it some water every 2-3 days. There were very hot days.
The clone has grown well:


Indeed, the bottom leaves are burning:

(click for hi res pic)

(click for hi res pic)

Any ideas? Got tips? Please, share them!
 
Brick Top

Brick Top

New Member
Does the following description of your problem sound likely to you?


N - NITROGEN (N)

Pale plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the plant. Add any chemical fertilizer containing N. Treated plants recover in about a week.

Or does this sound more likely?

Zn - ZINC (Zn)

White areas form at leaf tips and between veins. Occurs in alkaline soils. Zn deficiency can be treated by burying galvanized nails in the soil. Chemical fertilizer containing Zn can also be used.

Or could it be what's behind door number three Monty?

K - POTASSIUM (K)

Affected plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower leaves. Red stems. Leaves appear pale or yellow. Add chemical fertilizer containing K.

If it were actual nute burn I would expect to see dried/brown tips on the newer upper leaves.
　
What sort of lighting are you using and how far away from your light(s) is the plant? While I believe it is improbable it is still possible that if your lighting is weak the lower leaves are starved for light.
 
moash

moash

New Member
growerboy said:
No fert, it should be pre-fert soil (not sure about the composition, but it fits good for other plants like mint)
Click to expand...
that could be ur prob.....maybe the fert levels r not right for cannbis....
veg needshigher N
flower needs higher P
find out what the npk is
 
S

sweet boi

Member
requires Phosphorus . from photo i can see clone u took is from early flowering mother, in flowering state plant suck up a lot of P. This made the little clone deficient in P. give some P with less concentration and wait. dont over do as clones are very sensitive and weak when new..
 
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