Purple Gem Rhododendron in bloom |Spotswood Greenery

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Purple Gem Rhododendron |Prides Corner Farms

Photo courtesy of Prides Corner Farms

Purple Gem Rhododendron

Rhododendron X 'Purple Gem'

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Azure-purple flowers cover this dwarf shrub completely in early spring, on a plant that stays 2 to 3 feet tall and creeps 3 to 4 feet wide. Rhododendron 'Purple Gem' grows in part shade, hardy from Zone 5 through Zone 8.

The leaves are tiny and scale-like, finer than anything else in the group.

The small-leaved rhododendrons, sometimes called lepidotes, differ from the big-leaf types in more than size. They flower earlier, take more sun, handle cold better, and the foliage turns mahogany or plum through winter instead of staying green. The leaves are aromatic, releasing a spicy scent when brushed. In colder gardens they behave as semi-evergreens, dropping a share of the older interior leaves over winter while holding the newer growth at the branch tips. That thinning is normal and the plant refoliates in spring.

The low creeping habit suits a rock garden, a trough, or the front edge of a shaded bed. Acidic soil is necessary, roughly pH 4.5 to 6.0, with sharp drainage. Mulch the shallow roots.

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Size at Maturity

Height 2'- 3' Spread 3'- 4'

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Growing Zone

USDA Hardiness Zones 5-8

Lowest Temperatures -20°F to -10°F

Light Requirements

Part shade - 4 to 6 hours of direct sun per day, mostly before midday

Seasons of Interest

  • Spring
  • Summer
  • Fall
  • Winter

How to Plant

Give your new plant the best start possible. Click here for general planting instructions.

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Planting and Care Guide

Planting Tips

Plant in spring in acidic, moist, well-drained soil. Purple Gem is a compact, very cold-hardy rhododendron with small, neat leaves and bright purple-violet flowers in early spring. It is one of the toughest small-leaved rhododendrons available for northern gardens. Amend soil with peat or acidic compost if needed. Set root ball at or just above grade, mulch deeply, and water well.

Care Tips

Remove spent flower clusters after bloom. Feed with an acid fertilizer in early spring. Keep soil consistently moist. Replenish mulch annually. Purple Gem's exceptional cold hardiness, compact habit, and reliable blooming make it one of the best small rhododendrons for northern gardens. The bright purple flowers in early spring are vivid and welcome after a long winter. A dependable, long-lived plant for cold-climate gardens.

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