Trachycarpus palm — windmill palm (in ground)
ornamental_palm_in_ground · Trachycarpus fortunei (windmill / Chusan palm)? — TBC
Planned next action
Recipe: palm-trachycarpus-quadro-k-soil-drench-monthly
When: 2026-06-25 · evening
Monthly K maintenance per K-LOW soil baseline
Watering regime
Summer: weekly deep soak (established in-ground)
Cooler: every 2-3 weeks; minimal in winter
Method: Stick finger 10 cm down at the drip line — water if dry. Established Trachycarpus is drought-tolerant.
Source: Tap OK.
⚠ Phyto-watch (1)
Yellow leaf-tip browning — confirmed K deficiency (lab K 53 ppm = LOW for heavy-feeder palm) + likely Na toxicity contribution (lab Na 379 ppm = dangerous)
→ (1) IMMEDIATE foliar: palm-Mg-micro-vegetative recipe (this morning) — supports plant, doesn't cure root cause. (2) WITHIN 2 WEEKS: apply K-sulfate (potassium sulfate / SOP) at 200-300 g/m² around root zone. NEVER use MKP — soil P is already EXTREME. (3) ONGOING: gypsum (CaSO4) 2-4 kg/m² + deep leaching irrigation to flush sodium past root zone (months-long fix). (4) LONG-TERM: elemental sulfur + organic mulch to slowly lower pH 8.0.
Photos (6)
Day-0 post foliar+drench — crown closeup. Yellow leaf-tipping clearly visible on multiple fronds (matches lab K 53 + Na 379 diagnosis). Baseline image for tracking recovery.
Day-0 post foliar+drench — full palm side view, ~3-4 m mature Trachycarpus, full canopy with multiple yellow-tipped older fronds.
Day-0 post foliar+drench — uplook into canopy. Spear leaf (newest growth) green and healthy. Yellow streaking on older frond tips. Clear blue sky confirms dry conditions for spray.
Full tree in garden context
Uplook at fronds — yellow leaf-tip browning visible — phyto-watch flagged
Second uplook angle
Sprays (2)
- · pre_logged_user_confirmed_executed (Cem text 2026-05-25 night)
palm-trachycarpus-Mg-K-micro-vegetative · complete (pending 24-48h observations)