The Grow Awards 2026 🏆

Back to Grow Questions

Cal/mag problem or heat issue?

RudieCantFailstarted grow question 5y ago

A few leaves have some problem spots popping up here in week 6 (see pics). No nutes, PH’d water. FFOF/HF/Perlite mix for medium under 20 hours of light. I’m guessing either got too hot from being in 90F heat for an hour or needs cal/mag? Any advice from any veterans out there?

RudieCantFail

RudieCantFail

RudieCantFail

RudieCantFail

Solved

Leaves. Edges burnt

Leaves. Tips - Burnt

likes

Bloombusteranswered grow question 5y ago

Привет, друг! 👋 Это похоже на начало общего дефицита, тебе уже необходимо по-взрослому кормить свою девочку, она уже взрослая и хочет хорошо питаться. Это голод растения, нехватка необходимых элементов в питании! Увеличьте дозировки своих удобрений в поливе, бро! 👆 Ещё рекомендую поливать раствором с кислотностью 6,3ph 👆 Удачи, друг! ✊😇

1 like

Complain

Selected By The Grower

Similar Grow Questions

Solved

Critical mass auto What's going on here?

Leaves. Edges burnt

4y ago

2

6

Solved

3 leaves ?Why is this plant only producing 3 leaves when marijuana leaves usually produce 5

Leaves. Too few

Leaves. Edges burnt

Leaves. Color - Yellow

5y ago

2

2

Solved

1st set of leaves rotting The first node looks a bit burnt on the edges and is dropping where as the other leaves on top are fine and doing great. Just wondering should I chop them or leave them

Leaves. Edges burnt

Leaves. Curl down

5y ago

2

2

Solved

Nute burn or something else?My middle and top leaves are yellowing from the tip and edge inward, is this the nutrient burn or another issue altogether? Runoff PH was 5.9 and ppm was 700.

Leaves. Tips - Burnt

Leaves. Color - Yellow

Feeding. Deficiences

5y ago

3

2

Solved

Curled leaves, tips burnt, nitrogen toxicity?Hi guys, is this nitrogen toxicity? If so, what am I supposed to do? I watered 2 days ago and this morning I noticed curled leaves. Soil is not dry yet.

Leaves. Tips - Burnt

Leaves. Curl down

5y ago

2

Solved

Brown, deformed leaves Can you tell me what causes this?

Leaves. Tips - Burnt

Leaves. Curl down

Leaves. Color - Mottling

2y ago

5

Solved

Dealing with some nute burn: what are your best tips for avoiding nute burn in the future?

Leaves. Tips - Burnt

7y ago

4

6

Solved

Yellow/burned tips & curled leaves I have an issue with some yellow/burned tips and curled leaves. I already suspect that mainly is from light stress but could also be a nutrient deficiency? I´ve raised the lights the max I can and keep it at 80% for 20 hours. Biobizz soil and nutrients. Thanks in advance!

Leaves. Edges burnt

Leaves. Curl down

Leaves. Color - Yellow

7mo ago

10

7

Solved

SubliminalSociety

White spots on first set of leaves - should i worry?The first set of leaves has white-brownish spots at the end. I s that just stunted growth or should I be worried?

Leaves. Edges burnt

Leaves. Tips - Burnt

8mo ago

10

5

Solved

PH problem Hi.I have problem with low PH Grow in soil canna terra proff+,mineral canna terra nutrients , led lights,its 3rd week bloom autos Leaves turning yellow from bottom and yellow tips on top.I was sure its npk deficiency and maybe cal mag or light burn. EC:1.4 PH:5.5:( What to do ??

Buds. Not fattening

Leaves. Edges burnt

Leaves. Color - Yellow

4y ago

2

Solved

Burn leaves, heat stress Could anybody suggest me anything to do to this girl? I was mixing her indoor and outdoor but it's been so hot that she was hit by heat stress.. PH soil around 6.3 and keeping. Suggestion would be very welcome. Thanks in advance, guys!

Leaves. Edges burnt

1y ago

8

6

Solved

Slight leaf tip "burn"What do you think is causing this burn on my leaves? It seems to be quite common. and maybe nothing to worry about if it's this minute. but I would prefer to not burn my plants at all if possible. Could it be a sign of underwatering? Light distance? i have a dimmer keepin at 1000

Leaves. Edges burnt

Leaves. Color - Yellow

Setup. Lighting

2y ago

4

3

Solved

What's wrong with this? Or is this ok I think my plant has something wrong with it. The leaves seem be like as if something ate it. and the tips of the weed leaves shrivel up dried but the entirety of it seems ok...

Leaves. Tips - Burnt

4y ago

2

3

Solved

SupportiveMango

Is this light burn?Is this light burn? I’m about 7-10 days from harvest. Wondering if I need to increase the height of my lights?

Leaves. Edges burnt

4y ago

3

3

Solved

Damaged leaves Guys, Can you help me know what's wrong with these leaves? For each, it's about the very first big leave

Leaves. Edges burnt

Leaves. Veins - yellow between

6y ago

1

1

Solved

Wait plz, put me out misery What kind of deficiency?! Help me to fix this 💩😁👌

Leaves. Edges burnt

Leaves. Tips - Burnt

Leaves. Curl down

5y ago

2

2

Solved

Looking at pic of day 70, can it be light burn?

Leaves. Edges burnt

7y ago

1

1

Solved

CalMag or PK issue?What is she telling me? Before I was thinking of a CalMag issue (upper leafs have "burned" tips and get yellowish). So I added it to the reservoir. Is it CalMag or maybe a PK issue, that resolves in a CalMag issue? See my diary for more details.

Leaves. Tips - Burnt

Leaves. Color - Yellow

1y ago

4

4

Solved

what is my issue heat or nutrients.The leaves are curling towards the top of the plant and have tip burns basically throught my plants.

Leaves. Tips - Burnt

Leaves. Curl down

Leaves. Color - Pale

3y ago

1

1

Solved

Brown tips I'm really bad at distinguishing between the different types of damage, what would you say about those brown tips?

Leaves. Edges burnt

Leaves. Tips - Burnt

1y ago

1

1