Dahlia Tubers

Dahlia tuber FAQs

See below for advice and tips on growing, storing and buying dahlia tubers. Our Customer Service Team areavailable six days a week to answer your questions or you can check our general FAQs for further advice.

How do I plant dahlia tubers?

Start by selecting a sunny spot with well-draining soil. Dig a hole about 10-15cm deep and place the dahlia tuber horizontally with the "eye" (small bump) facing upwards. Cover it with soil, but do not water it immediately as overly wet conditions may cause rotting. Water sparingly once growth begins, increasing as the plant establishes itself. Remember, dahlias thrive when planted in nutrient-rich soil, so consider enriching yours with compost or a balanced fertiliser.

When is good to plant dahlia tubers?

The best time to plant dahlia tubers is after the last frost in
spring when the soil has warmed slightly. In the UK, this typically falls between late April and early June, depending on your location. If you're eager to get a head start, you can pot tubers indoors in late March or April and transfer them to your garden when conditions are favourable. Planting during the right window ensures your dahlias will grow strong and deliver a stunning display throughout the summer.

How do I store dahlia tubers over winter?

Proper storage is essential to preserve dahlia tubers for future
planting. Begin by digging up the tubers at the earliest signs of frost. Trim the stems down to remove foliage and wash off excess soil, being careful not to damage the tubers. Allow them to dry in a cool, airy place for a few days. Once dry, pack them in a box filled with dry compost, sawdust or even newspaper to prevent rotting. Store in a frost-free location such as a garage or shed. Regularly check for signs of rot or dehydration, discarding any damaged tubers.

How do I split dahlia tubers?

Dividing dahlia tubers is an excellent way to get new plants for free and ensure healthier growth. Do this in late winter or early spring before planting. Use a clean, sharp
knife to separate tubers, ensuring each piece has an eye or growth point. Look for the small, bumpy areas near the stem, as these are where new shoots will emerge. Handle the tubers carefully to avoid breaking them. Let any cut surfaces dry out for a day to prevent rot. Once divided, your tubers are ready for planting or storage.

How long do dahlia tubers take to sprout?

Dahlia tubers typically take 2 to 4 weeks to sprout, depending on temperature and soil conditions. Warmer soils will encourage quicker growth, so ensure the ground is warm enough when planting outdoors. If starting indoors, maintain a consistent temperature to avoid shocking the tuber when it goes into the ground. Be patient, as growth may seem slow initially. Once the shoots appear, your dahlias will grow vigorously and reward you with lush foliage and striking flowers – typically blooming around 100 days after planting.

Why buy dahlia tubers from Marshalls Garden?

• Drawing on over 70 years of gardening experience, we choose only the finest dahlia varieties to thrive in British gardens and back them up with a 100% satisfaction guarantee.
• Whether you're after timeless classics or bold new hybrids, our dahlia tubers for sale ensure a spectacular display of vibrant, long-lasting flowers.
• Our dedication to quality and customer care has earned us glowing praise, including thousands of 5-star reviews on Trustpilot. When you choose Marshalls Garden, you're joining a community of gardeners who trust in our dependable, high-performing plants.
• New to growing dahlias? No problem. Our straightforward planting tips and expert support team are here to guide you every step of the way. We're available six days a week, even on bank holidays, to answer all your questions and help your garden flourish.
• Your dahlia tubers will arrive in peak condition, securely packaged in eco-friendly, fully recyclable materials. With our ready-for-planting delivery service, you can take the guesswork out of your gardening and look forward to vibrant blooms.
• Proud recipients of the Silver Award for Best Online Retailer at the 2022 Great British Growing Awards, we're committed to delivering exceptional quality and customer service. Shop with confidence knowing you're getting the very best for your garden.