Fertilizing Newly Planted Hemlocks: Holly-tone Timing and Winter Burn Prevention

David in Albany, NY planted 6-foot hemlocks last fall. They show winter burn and uneven spring growth. He applied Holly-tone in early April; the installer recommends a second application in June. David wonders if that's excessive.

Fertilizer Advice

• Holly-tone is an acid-forming, slow-release organic fertilizer (4-3-4) with sulfur. Good for hemlocks.
• One spring application (April) is sufficient. A second in June risks over-fertilization, especially on stressed trees.
• Fall application (late October) is beneficial for root development.
• Reduce rate: If applying twice, use half the recommended rate each time.

Winter Burn Prevention

Winter burn on evergreens is caused by frozen soil preventing water uptake while foliage loses moisture to sun/wind. The best prevention:

1. Deep watering in late fall (October–November) until ground freezes. Soak root zone thoroughly.
2. Anti-desiccant spray (e.g., Wilt-Pruf) in late fall and mid-winter on warm days.
3. Wind barrier: Burlap screen on windward side (not wrapped tight).
4. Mulch: 2–3 inches, kept off trunk.

Uneven Growth

Trees showing no growth may have root damage or planting issues. Check planting depth (root flare visible), soil compaction, and moisture. Scratch bark on leafless branches—green underneath means alive; wait and watch.

Stick to one spring fertilizer application, prioritize fall watering, and monitor.