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How to Grow Rhododendron

Reviewed by MyLocalPlanting Editorial Team Updated Sources
Rhododendron (Rhododendron spp.)

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Plant nursery stock — skip years of growing from seed.

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Supplies You'll Need

Watering Can

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Plant Overview

Scientific Name Rhododendron spp.
Category shrub
Type Shrub (nursery stock)
Days to Maturity 365 days
Starting Method Nursery Stock

Growing Requirements

Sun

Part Shade

Water

Regular; never waterlogged

Spacing

6 ft apart

Height

4-8 ft

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Companion Planting Guide for Rhododendron

Discover which plants grow well with Rhododendron and which to keep at a distance for a healthier garden →

Seed Saving Guide

Vegetative propagation

Propagate vegetatively, not by seed

Layer a low branch or take semi-hardwood cuttings in late summer; seed-grown plants take many years and vary widely.

Rhododendron Planting Calendar by Zone

Zone 1a Zone 1b Zone 2a Zone 2b Zone 3a Zone 3b Zone 4a Zone 4b Zone 5a Zone 5b Zone 6a Zone 6b Zone 7a Zone 7b Zone 8a Zone 8b Zone 9a Zone 9b Zone 10a Zone 10b Zone 11a Zone 11b Zone 12a Zone 12b Zone 13a

Rhododendron Planting Calendar by State

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Frequently Asked Questions

When should I plant Rhododendron? +

Plant container-grown or bare-root Rhododendron in early spring, 2 weeks before your last frost date — or in early fall once summer heat breaks. Use the search on this page to find exact dates for your location.

How long does Rhododendron take to grow? +

Rhododendron typically blooms in about 365 days from planting. Exact timing varies by variety, soil conditions, and local climate.

Should I start Rhododendron indoors or direct sow? +

Neither — Rhododendron isn't grown from seed at home. Buy a container-grown or bare-root plant from a nursery and plant it outdoors at the right time for your local frost dates.

How much sun does Rhododendron need? +

Rhododendron requires part shade to thrive.

How far apart should I plant Rhododendron? +

Space Rhododendron plants 72 inches apart to allow adequate airflow and root development.

How much water does Rhododendron need? +

Rhododendron has regular; never waterlogged water needs. Consistent moisture is important especially during germination and early growth.

Can you save seeds from Rhododendron? +

Rhododendron is not typically propagated by seed. Layer a low branch or take semi-hardwood cuttings in late summer; seed-grown plants take many years and vary widely.

About Rhododendron

Bold evergreen foliage and large spring flower trusses. Like its azalea cousins it wants acidic, humus-rich, well-drained soil and protection from hot afternoon sun and drying winter wind.

Expect your Rhododendron to be ready for harvest in approximately 365 days from planting.

Use the search above or browse by zone or state to find the perfect planting dates for your location.