What's wrong with my plants, they seem burnt, not sure what to do?

A question from a fellow grower:

Well it seems that I am burning the leaves of my clones with the light I assume, but I’m using 2 small cfls, so idk I’m not really sure what to do, I’ve tried to raise them and stuff but I guess it’s too hot in there.

You are on the right track - you need a fan - use back of hand test to see if lights are too close -

I do have a fan in there already, usually the temperature is between 21-24C and humiditity its usually 50-60%. Should I get another fan in there ? And to me the lights aren’t hot but idk my leaves turn yellow so xD

I’d add another fan but that’s my opinion or put a small ice chest in there with ice in it, and set that behind the fan, so the fan drags cool air from ice chest through the room. Make sure lid of Ice chest is partially held open so that way you are actually getting the cooler air to circulate the room

Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so = NA

Strain; Type, Bag seed, or NA

Soil in pots, Hydroponic, or Coco?

System type?

PH of runoff or solution in reservoir?

What is strength of nutrient mix? EC, or TDS

Indoor or Outdoor

Light system, size?

Temps; Day, Night

Humidity; Day, Night

Ventilation system; Yes, No, Size

AC, Humidifier, De-humidifier,

Co2; Yes, No

Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but short, to the point questions and facts will help us help you smile

are you feeding it nutrients? type ?

Have you checked your ph? If not water your plants and check the run off.
I’m going to post a pic which shows very similar deficiency as yours does this is why I ask…

Problems with Phosphorus being locked out by PH troubles
Cold wet soils, acid or very alkaline soils, compacted soil.


Phosphorus gets locked out of soil growing at ph levels of 4.0-5.5
Phosphorus is absorbed best in soil at a ph level of 6.0-7.5 (wouldn’t recommend having a ph of over 7.0 in soil) Anything out of the ranges listed will contribute to a Phosphorus deficiency



Strain; I don’t know. I was never told.

Soil in pots

PH of runoff: between 6.0-6.5

What is strength of nutrient mix? 30-10-10 ever other water (which would be every two weeks)


Light system, size: I am using 2 daylight cfls (equivalent to 40w regular) and one fluorescent 15w

Temps; Day: 22-25 Night: idk because I’m sleeping LOL

Humidity; Day: 55-60% Night: 50%

Ventilation system; I have a fan that’s about it :confused:

AC, Humidifier, De-humidifier: No

@Donaldj @garrigan62

You are likely seeing results of nitrogen toxicity that’s a very strong fertilizer for a small plant

you also need more light

Oh ya that number 30
When you mix your next feeding solution, you feed get the ph of the solution.
Something here isn’t comming out wright and im leaning more toward ph


lol it’s always ph but I see 5 nodes on some and a fertilizer I wouldn’t use till 3 months in veg let alone no idea of NPK of soil they are in to start with.

I have been thinking and something isn’t jive’n here.

Also your answer to #2 is not an answer. SOIL SOIL what kind of soil are you useing and does it have nutrients in it. If it does…list them if you can…ok

Its the soil and fertilizer is what I think is causing his deficiency.


What should I be using then?

this is the type of soil I am using. I have already lost one and I’m starting to lose a second. Help.

This soil isn’t necessarily the problem.

It does sound like you are feeding a nutrient mixture to plants that are too young for so often or at such a strong concentration.


22 days later are we having a new issue?

No I think they just need nuits. It’s the same problem though.

What nutrients should I give them at that age

That very much depends on what you have access to? I like cannabis specific product lines like General Hydro flora series or Advance Nutrients product line if those are hard for you to find than most tomato specific products can work as well