Zone 4 · Rhododendron
Planting Rhododendron in Zone 4
Rhododendron catawbiense
✅ Rhododendron thrives in zone 4 (hardy 4–8)
Can I plant today?
⏳ Too early to direct-sow
Last frost is in 4 weeks. Wait until soil warms.
Evaluated for April 27, 2026 ·
Zone's last frost
around May 15
Zone's first frost
around September 15
Bloom window
April – June
Peak bloom
May
Sun required
part sun
Mature height
72"
Spacing
48" apart
Type
perennial
How to plant Rhododendron in zone 4
Plant in spring or fall in acidic, well-drained soil. Mulch heavily; never let soil dry out.
Pair with these for continuous bloom
Rhododendron peaks in May. These companions keep your bed in color before and after.
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