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[Bluey]

Are you growing in soil or a mix of coco?

Looks like the beginning of a calmag deficiency with the slight loss of pigment and rust spots beginning to appear. Often typical of a coco grow.

If you just started nutes give it a bit to see if you get further changes. The damaged leaves won't fix even if you've fixed the problem. Watch the top leaves too.

[Eclipce]

Help! Leaves are getting spots.

Hi. spots appear on the leaves of 2 plants(Laughing Buddha and Сritical Kush) out of 5. I noticed 5 days ago. The plants are 20 days old after planting in the soil. The spots appeared before I started giving them nuts (I use advanced nutrients pH Perfect® Grow, Micro, Bloom). I water about every 2 days with 500 ml of tap water. The Mars Hydro FC 4800-EVO LED lamp is 45 cm above the plant and works at 65%. I think it's a potassium deficiency.
What do you think it could be?

[Bluey]

I'd reduce EC, especially nitrates.

New growth should be light green not dark green indicates a bit too much N to me.

Nute burn on leaf tips also

Overall though looking pretty good.

[Bluey]

I'd reduce EC, especially nitrates.

New growth should be light green not dark green indicates a bit too much N to me.

Nute burn on leaf tips also

[Bluey]

I'd reduce EC, especially nitrates.

New growth should be light green not dark green indicates a bit too much N to me.

Nute burn on leaf tips also

[Yaboty]

HELP!!!

clawing and browning of tips of upper levels, also leaves seem like shrunk or not fully stretched, I thought it was light problem so I decreased the intensity, and gave it Calcium nitrate and Magnesium sulphate nutrients once, after 1 day still no change, should I wait or could there be another problem? I don't know whats bothering her

[Yaboty]

just water

[Rootsruler]

Are you feeding them or just water?

[Yaboty]

Will do thanks for the advice

[Rootsruler]

Roots don't like light. Cover up the clear plastic pots.

[Yaboty]

HELP!!!! Lower Leaves are spotting then turning yellow and droppy, spraying and watering with hydrogen peroxide to kill fungus gnats didnt seem to fix it, im using ready mix soil mixed with perlite, 3 weeks old

[Rootsruler]

Agree with Bluey and @Rwise.

Do a soil slurry test to find out what the soil pH is. This should give you an indication of if your pH is too low.

https://support.aperainst.com/support/solutions/articles/14000135710-how-test-soil-slurry-s-ph-

[Rwise]

IF you have these in soil the PH is low, PH for soil in veg is 6.2-6.5 and in flower (I see flowers) 6.5-6.8.

[Bluey]

Vary your pH intermittently. If growing in coco vary it 6 to 6.3. If in soil higher again. Read up on pH fir different mediums.

When in flower keep temps under 24⁰C.

Edit. I see in your earlier post (a bit over 3 weeks ago) you are growing in soil. I advised a pH of 6.4/5 then but you are giving it 6.0. Why? Your problem is too low pH.

[Elias2107]

Now I’ve got a nutrient deficiency for my autoflowers. Temps are between 20-30C one day it went to 37 but fixed that quickly. Feeding them pH 6.0 EC 1.2. Don’t know what the problem is so need some help