How to Plant and Care for Rhododendrons Like a Pro

Rhododendrons are among the most stunning and low-maintenance shrubs you can add to your garden – especially here in the Vancouver area, where the climate suits them perfectly. Their lush, evergreen foliage and breathtaking blooms bring a burst of colour and serious curb appeal to any outdoor space. And the best part? With just a little care and attention, they can flourish for years.

When and Where to Plant:

• Best seasons: Early spring or fall are ideal times for planting. The weather is cooler, and the soil is still warm – perfect for encouraging healthy root development.
• Choose a spot with partial shade: Rhododendrons like a bit of sun but not too much. Morning sun with afternoon shade is perfect. If other trees are nearby to provide dappled shade, even better.
• Avoid extremes: Steer clear of planting them in full sun (which can scorch the leaves) or deep, heavy shade (which can stunt growth and increase the risk of disease).

Soil and Drainage Tips

• Well-draining soil is a must: Rhododendrons hate “wet feet.” To prevent root rot, make sure your soil drains well. Slightly elevated or sloped areas work well.
• Keep it moist but not soggy: They love consistently moist soil, especially during the warmer months, but it should never feel saturated.
• Acidic soil is best: Aim for a pH between 4.5 and 6.0. If you’re unsure, you can test your soil and amend as needed.
• Amend the soil with organic matter: Incorporate compost, well-rotted manure, or chopped leaves to improve texture and nutrient content.

Spacing and Planting

• Give them room to grow: Depending on the variety, space your plants 2 to 6 feet apart. This allows for good air circulation and gives their root systems room to expand.
• Planting depth: Dig a hole as deep as the root ball and about twice as wide. Gently loosen the roots before placing the plant in the hole, then backfill with soil and water thoroughly.

Should You Fertilize?

Yes… but sparingly. Use a fertilizer formulated for acid-loving plants, and apply it in early spring just as new growth begins. Avoid fertilizing late in the season, as this can encourage new growth that’s vulnerable to frost damage.

Trimming and Pruning Tips

Regular pruning helps keep your rhododendrons healthy and encourages fuller growth. Here’s how to do it right:

• Timing matters: Prune right after the flowers fade but before new growth starts. Rhododendrons form next year’s flower buds during the summer, so pruning too late can remove those precious blooms.
• Go gentle: Don’t cut back too aggressively. Over-pruning can result in fewer flowers (or none!) for a season or two.
• Remove spent blooms and dead wood: This helps the plant focus its energy on new growth rather than seed production.
• Use the right tools: High-quality pruning shears will make the job easier and cleaner. Always sanitize your tools with rubbing alcohol between plants to prevent the spread of disease.
• Where to cut: Snip just above the base of the old flower cluster. If you’re removing dead or damaged branches, follow them back to healthy wood and make your cut there.

With just a bit of prep and care, your rhododendrons will reward you with gorgeous blooms and lush greenery year after year. Happy planting!

Are you overwhelmed by the thought of trimming and pruning? Don’t stress! Call ATC Landscape today if you are located in Coquitlam, Port Coquitlam, Port Moody, Pitt Meadows: 604-720-2853.