Spálené hnojivem a nebo světlem?

Hey Buddy Leaf Damage at the Top Week 5 Flower Short answer: This is light stress + nutrient concentration at the canopy, not a disease and not a major deficiency. 🔍 What the photos are telling us What we see: • Damage only at the top canopy • Marginal necrotic spots / rusting • Tips and edges affected first • Lower and mid canopy look healthy • Buds look strong and stacking well That pattern immediately rules out root problems or systemic deficiencies. ⸻ 💡 Light is the main trigger here You said: • Spider Farmer G4500 • 100% power • 40 cm distance At week 5 flower, that’s a lot of photons, especially combined with feeding. Even if PPFD is “within range” on paper, plants don’t read charts — they react to total stress load. ⸻ Feeding + light = concentration at the leaf edge Your input: • pH 6.5 • EC 1.6 Your runoff: • pH 6.3 • EC 2.2 ⚠️ That tells us: • salts are accumulating in the medium • uptake is slightly outpacing transpiration • leaf margins are burning first (classic) This is not overfeeding alone — it’s overfeeding + high light intensity. ⸻ 🚫 What this is NOT Let’s be clear: • ❌ Not pests • ❌ Not disease • ❌ Not potassium deficiency • ❌ Not magnesium deficiency So no sprays, no panic flushes. ⸻ ✅ What to do (simple & effective) 1️⃣ Reduce light stress slightly You have two good options: • Raise the light 5–10 cm • OR dim to 90–95% You don’t need to go drastic — just ease the top leaves. ⸻ 2️⃣ Ease nutrient pressure a bit Next few feeds: • Slightly reduce EC (aim ~1.4–1.5 input) • Keep pH stable • Let runoff EC come down gradually Do not strip bloom nutrients — just soften them. ⸻ 3️⃣ Leave damaged leaves alone • Old damage won’t heal • If the leaf is still photosynthesizing → keep it • Remove only if it’s fully necrotic later ⸻ 👀 What to watch next Over the next 5–7 days: • New top leaves should stop spotting • Margins should stay clean • Bud development should continue normally If damage stops spreading, you nailed it. ⸻ 🌱 Final takeaway This plant is healthy. It’s just being pushed right at the edge. A small adjustment now keeps: • yield • quality • terpene expression …without risking further burn. Growers Love my friend, keep us posted and remember this is just my humble opinion, please follow your instincts 🙌👊🙏