Which is Easier to Grow: Azaleas or Rhododendrons?

Azaleas and rhododendrons are two of the most popular flowering shrubs for gardens With their stunning blooms that come in a rainbow of colors, it’s no wonder why!

As part of the genus Rhododendron, azaleas are actually considered a type of rhododendron. But when it comes to their care and growth habits, there are some key differences between the two plants.

So if you’re looking to add one of these beauties to your garden, you may be wondering—which is easier to grow: azaleas or rhododendrons? Here’s what you need to know to choose the right shrub for your needs.

Azalea Basics

Azaleas are generally smaller shrubs, ranging in size from just under a foot to over 15 feet tall depending on the variety. They have smaller, thinner leaves that are either deciduous or evergreen.

The flowers come in whites pinks purples, reds, oranges and yellows. Unlike rhododendrons, azaleas can even have multiple colors on a single bloom. The blooms are funnel or tubular shaped, with five stamens.

Azaleas are native to several areas including North America, Europe and Asia. They thrive in zones 6-9, depending on the variety.

Rhododendron Basics

Rhododendrons are larger shrubs, usually growing 5-20 feet tall or more. The leaves are thicker, larger and leathery. Most varieties are evergreen, holding onto their foliage year-round.

The flowers grow in large clusters at the end of branches. They come in classic shades like white, pink, purple and red. The blooms are bell-shaped, with 10 stamens.

Rhododendrons are native to North America, Europe and Asia as well. They grow best in cooler climates, zones 4-8.

Growing Conditions

When it comes to growing azaleas vs rhododendrons, the conditions are quite similar:

• Soil pH: Acidic soil, between 4.5-6.0 pH
• Sun: Dappled sunlight or morning sun and afternoon shade
• Water: Consistent moisture, but well-draining soil
• Fertilizer: Azalea/rhododendron or acidic loving plant fertilizer

The main difference is that rhododendrons need protection from harsh winter winds, whereas azaleas are a bit more cold tolerant.

Ease of Growth

When weighing which is easier to grow between azaleas and rhododendrons, azaleas win by a slight margin. Here’s why:

• Blooming: Azaleas bloom earlier in spring, avoiding risk of late frost damage to buds.

• Pruning: Azaleas only need pruning after flowering. Rhododendrons need tip pruning for shape.

• Insects: Azaleas have fewer insect problems overall.

• Varieties: Azaleas come in more varieties suited to a wide range of climates.

• Heat/cold tolerance: Azaleas handle heat and cold better overall.

• Planting: Azaleas have an easier time getting established after planting.

• Care: Azaleas are more forgiving if conditions aren’t perfectly ideal.

Tips for Growing Azaleas

If you decide to add azaleas to your landscape, here are some tips for success:

• Choose a variety suited for your planting zone.

• Give them dappled sunlight or morning sun only.

• Plant in spring or fall in acidic, humus-rich soil.

• Water 1-2 times per week for the first season while establishing.

• Mulch around the base to retain moisture and even out soil temperature.

• Fertilize in early spring with an azalea fertilizer.

• Prune immediately after flowering to avoid removing next year’s buds.

Tips for Growing Rhododendrons

To grow rhododendrons, keep these tips in mind:

• Select cold-hardy varieties if you live in a cooler climate.

• Plant in spring or fall in well-draining, acidic soil.

• Give them morning sunlight and afternoon shade.

• Water 1-2 times per week after planting and during droughts.

• Mulch around the base to retain moisture and regulate soil temperature.

• Fertilize with acidic plant fertilizer in early spring.

• Prune only lightly for shape after flowering.

The Bottom Line

While rhododendrons offer that classic, bold floral display, azaleas are a bit easier for the average gardener to grow. Their general hardiness, wide variety of options, and more carefree nature give them the edge.

However, both shrubs make stunning additions to the garden. So whether you choose azaleas or rhododendrons, following the specific care tips for your plant will set you up for many springs of breathtaking blooms!