Experience the grandeur of the Triumph de Grande Rhododendron, adorned with masses of huge trusses featuring white flowers elegantly accented with red spotting on the upper lobe. This rhododendron epitomizes magnificence in every bloom.

With a minimum height of 1.8 meters after 10 years, the Triumph de Grande Rhododendron stands tall and proud, showcasing its robust growth and impressive floral display. Blooming in October, these rhododendrons will be ready as small plants, promising a future of beauty and elegance in your garden.

Curious about the Triumph de Grande Rhododendron? Reserve your small plants now for October delivery and let’s discuss how this magnificent rhododendron can elevate your garden!”

When you purchase a rhododendron, you will receive a well-established four-year-old plant grown in a 6L pot, with a strong root system and often developing flower buds, ready to settle in and thrive in your garden. To help you plan for the plant’s eventual scale, the mature heights listed in the Product Information are estimated 10-year sizes from the time of planting. For more detail, please refer to our Size Guide in the FAQs.

Learn More: Size Guide

At RhodoDirect, all of our rhododendrons are grown in pots, so you can plant them at any time of the year.

If you have the choice though, I always say autumn is best. The soil is still warm, which encourages strong root growth, but the plant isn’t under the stress of summer heat. It gives your rhodo time to settle in properly before winter and sets it up beautifully for spring.

Preparing the Soil (Don’t Skip This Part)

The work you do before planting makes all the difference.

I always thoroughly break up the soil and mix in plenty of organic matter — compost, bark, peat or lovely well-rotted leaf mould. Rhododendrons love rich, airy soil.

If you’re planting just one shrub, prepare as wide an area around it as you can.
If you’re planting a bed, improve the whole bed — not just the hole. Roots don’t stop at the edge of the hole!

Preparing the Root Ball (This Is the Step Most People Miss)

This is probably the most important part.

When you take the plant out of the pot:

• Soak the root ball in a bucket or tub of water.
• Gently hose off some of the old potting mix.
• Carefully tease out the fine roots with your fingers.

If you don’t loosen those roots, they can stay circling in a tight mass and struggle to move into your garden soil. I always say — be brave here. It really helps the plant establish properly.

Digging the Hole — Shallow Is Key

Rhododendrons hate being planted too deeply.

• Dig the hole only slightly deeper than the root ball.
• Make it wide enough for the roots to spread comfortably.
• Always plant at the same soil level it was in the pot — or even slightly higher.

If you have heavy or clay soil (which many of us do), rough up the sides of the hole with a fork so it doesn’t create a hard wall. I also recommend adding gypsum to help improve structure.

In heavier soils, I actually raise the plant about 8cm above ground level and mulch up around it. Rhodos love air around their roots.

Planting, Watering & Mulching

Once your plant is positioned correctly:

• Backfill gently with your improved soil mix.
• Water thoroughly to settle everything in.
• Stake if it’s in an exposed spot.

Then apply about 8cm of organic mulch — bark, leaf mould or pine needles are perfect.

Mulch is one of the best things you can do. It keeps moisture in, suppresses weeds, protects roots, and maintains the slightly acidic conditions rhododendrons thrive in.

Fertilising — Less Is More

I never put fertiliser in the planting hole. It can burn those delicate new roots.

Instead, apply fertiliser on the surface after planting. Rain and watering will naturally carry nutrients down where they’re needed.

My Final Advice

If you remember just three things:

• Plant shallow
• Tease out the roots
• Improve the soil generously

Do those well, and your rhododendron will reward you for years to come.

Rhododendrons are rewarding and easy to grow once their basics are right — most issues come down to watering, drainage, or planting depth. We recommend keeping roots cool and moist (but not waterlogged), planting shallow in well-drained acidic soil, mulching annually, feeding lightly in spring, and providing morning sun or dappled shade with shelter from harsh afternoon sun and wind.

For more detailed guidance on feeding, pruning, and common issues, start with our General Care Guide, which contains all the advice you need to keep your rhododendrons thriving.

Read More: General Care Guide

We offer hand delivery within Christchurch. Outside of Christchurch, plants are sent via Post Haste and carefully packed in sturdy boxes, with up to four 6L plants fitting per carton, making it most economical to order in multiples of two or four.

Orders are dispatched Monday to Wednesday to avoid weekend delays, and for larger orders (10+ plants) we may recommend a bulk freight option. For full details, including height limits and delivery timing, please see our Shipping FAQs.

Learn More: Shipping Information