Because rhododendrons grow in acidic soil—ideally between a pH of 4.5 and 6.0—they may struggle to establish in certain geographical areas. If you're considering planting some, plant expert ...

Rhododendrons are hardy in USDA zones 4A to 8B. They're understory plants, meaning that they grow under the shady canopies of tall trees in their native habitat.

What: Rhododendron ‘Vulcan’ blooms in late spring with trusses of bold fire-engine red against a backdrop of deep green foliage held on rounded shrub. Where: This rhododendron is easy to grow ...

By JANE MOSIER Master Gardener Apr 13, 2001 Apr 13, 2001Updated Feb 7, 2025 0 ...

Cynthia is an old favourite rhododendron, introduced in the mid-1800s. It bears huge clusters of rose-pink flowers. It is not naturally neat and tidy.