Rhododendron Butterhorn is an evergreen rhododendron admired for its brilliant yellow, trumpet-shaped flowers with deeper yellow-green throats, which open from buds in November, creating a glowing display in late-spring gardens. Growing to approximately 1.8 m in height, this upright and slightly open shrub combines structural elegance with showy floral colour, making it an ideal feature for garden borders, mixed shrub beds, or specimen planting.
This cultivar thrives in well-drained, acidic soil with full sun to partial shade, and its evergreen foliage provides garden interest year-round. The bright blooms attract pollinators while adding bold, cheerful colour to outdoor spaces, complementing other acid-loving plants.
Perfect for gardeners seeking a late-spring flowering shrub with strong visual impact, Butterhorn delivers both reliable growth and striking colour. Order online from RhodoDirect today, or visit our nursery to see it in bloom and get expert planting advice.

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

All our rhododendrons are grown in pots, so you can plant them anytime, though autumn is ideal for encouraging strong root growth. Find the right spot based on your chosen rhodo, improve the soil generously with organic matter, gently tease out the roots, and plant shallow at or just below the original soil level. Finally, mulch well and water thoroughly to help your plant establish.

Read more here | Planting & Soil Preparation Guide

Rhododendrons are rewarding and easy to grow once their basics are right — most issues come down to watering, drainage, or planting depth. Follow our planting guide for a great start, prune as needed, mulch annually to keep roots cool, and feed lightly in spring for a spectacular bloom later in the year.

Keep an eye out for common issues like powdery mildew or thrip, and address them promptly. We have plenty of information on caring for your rhododendron, and if you can’t find what you need, we’re always happy to talk all things Rhodos. Find a full overview in our General Care Guide (link below).

Read More: General Care Guide

We provide local delivery within Christchurch and ship nationwide via Post Haste, with all shipping costs calculated at checkout. Plants are carefully packed in sturdy banana boxes, and shipping is calculated based on this packaging. To maximise value, orders of 2–4 plants (up to 4 plants per box) are usually the most economical. Orders are dispatched Monday to Wednesday to avoid weekend delays.

Larger orders (10+ plants) may be sent via our bulk transport partner, Rockeater, for a cost-effective solution.

Every order is packed with care to arrive in excellent condition and ready to thrive. For full details, see our Shipping FAQs.

Learn More: Shipping Information