Brown spots

hey buddy how are you my friend ? Man this looks like Spider Mite Damage (Early–Mid Stage) That pattern on the leaf is classic spider mite feeding. What gives it away: • Fine yellow/white stippling (tiny dots) • Damage looks like it’s inside the leaf tissue, not surface burns • Starts on older/lower leaves • No sharp edges like nutrient burn • No clear interveinal pattern like deficiencies This is mites piercing cells and sucking them dry. ⸻ 🔍 How to confirm (very important) Tell them to: • Flip the leaf over • Look closely at the underside, especially near veins • Use a loupe or phone camera zoom They’ll likely see: • tiny moving dots (red, brown, or translucent) • possibly very fine webbing if it’s progressing ⸻ ⚠️ What it is NOT Let’s rule out common confusion: • ❌ Not calcium deficiency • ❌ Not magnesium deficiency • ❌ Not light stress • ❌ Not pH issues Nutrients don’t create random stippling dots like this. ⸻ 🛠️ What to do (simple & effective) Immediate actions: 1. Isolate the plant if possible 2. Increase air movement 3. Lower temps slightly if high (mites love heat & dry air) Treatment options (veg-safe): • Insecticidal soap • Neem (lights off only) • Potassium salts of fatty acids • Spinosad (if allowed where they live) 👉 Spray undersides of leaves — that’s where mites live. Repeat every 3–4 days for at least 2 weeks to break the life cycle. ⸻ 🧠 Extra grower tip If mites show up, it’s often linked to: • dry air • stagnant zones • stressed plants Fixing the environment is just as important as spraying. ⸻ 🌱 Reassurance Caught early like this, it’s very manageable. Ignore it, and it spreads fast. Hope that this helps my friend, keep us posted on the outcome 💚 Growers Love DD 💚💚💚

I'd suggest spray the leaves with something that has high pH that of 13-14 to kill it

Looking up macro deficiencies - they typically end up in gradual discoloration either from center or from edge of leaf, you seem to have a fungal pattern

Looks like a fungal disease - are you running high humidity?

Calcium issues. Possibly wacky pH. Check for pests and up the feeding a little bit

Cal Mag deficiency. This is strange, particularly in fresh transplanted soil. Check pH and EC level of the soil by analyzing the drain.