Our Complete Guide To Planting Dahlia Tubers

Dahlias are an ever-popular choice for many a summer garden. Their easy-to-grow tubers produce phenomenal displays of colour and texture in a range of styles throughout the season. However, if you’re new to gardening, you may be wondering how to plant these beauties.

Planting Dahlia tubers is a straight forward process, perfect for those with less experience. With their beauty and effortless maintenance, it’s easy to see why they’re a horticultural favourite.

Why Choose Dahlias?

  1. Dahlias are easy to grow and suitable for gardeners of all skill levels. These blooms are fast-growing by nature and will flower in the first year and for many years to come (keep them stored and frost-free over the winter).
  2. Dahlia tubers are versatile and will tolerate most types of well-drained, fertile soil or compost. They can be grown successfully in pots, tubs, window boxes and in borders.
  3. They are a firm favourite due to the many different types, sizes, and colours available on the market.
  4. New varieties are created each year. Once you’re hooked on Dahlias, you will always be able to find something new.
  5. They flower continuously through the summer, right up until the first frost of the autumn.
  6. They look fantastic as cut flowers, making any display a memorable one.

Varieties

Before we move onto planting dahlia tubers, here are the main types of Dahlias. Each variety can be classified into several different categories, representing the main characteristics of the flower blooms themselves.

Anemone Flowering – Also known as Powder Puff Dahlias, these beauties produce unique flowers with double feathered central petals resembling a fluffy ball.

Cactus – A favourite for many years, Cactus Dahlias produce fully double pointed petals which turn backwards to create a tubular petal effect. Are sometimes referred to as Spiky Dahlias.

Dark Leaf – As the name suggests, the foliage on this variety is not the usual bright green that you see on your average Dahlia. They create an abundance of flowers through the summer, with each bloom appearing on darker (usually purple/black) foliage.

Decorative – Produces large, fully double flowers with rounded petals through the summer right up until the first frosts. A perfect choice for cut flower displays.

Dwarf – A range of smaller, more petite Dahlias which are perfect for the front of the border. They are prolific flowering varieties, look also great planted mixed in pots on the patio.

Dinner Plate – As the name suggests these are the largest flowers within the range, often up to as much as 25cm in diameter (see illustration below). Another popular choice as cut flowers.

Pompom – Love the unusual? Pompom Dahlias produce ball-shaped blooms that appear through the summer. Each petal has rounded tips and are curved upwards at the edges, and are available in plenty of colours.

Planting Dahlia Tubers

All our Dahlias are supplied as top quality dormant tubers which can be planted as soon as you receive them. The success rate from these dahlia tubers is extremely high. They are also an inexpensive way to create a large number of flowers from one plant.

Dahlia tubers should be planted 10cm deep in fertile well-drained soil, outdoors in spring when the frost has disappeared. They prefer to be in a sunny location and spaced at approximately 45cm apart. In areas where there is extreme cold, dig up dahlias and store in a cool peat over the winter. Apply a high potash fertiliser every few weeks in the summer to help growth and they can be dead headed when necessary.

Planting Dahlia tubers in Pots & Containers

Planting Dahlias in pots and containers is a fantastic way of brightening up your patios. Their unique colours and shapes will brighten any space, a perfect choice for gardens with less space to play with.

  1. Once your tubers arrive safely in the post, they can be soaked overnight in a bucket of water to soak up as much moisture as possible.
  2. When all signs of frost have passed they are ready to pot up, leaving plenty of time to grow a well-established root before the summer.
  3. It is recommended to place some pebbles at the bottom of the pots before adding the compost to help with drainage, by ensuring the compost doesn’t block the drainage holes.
  4. Fill in some compost and then add the tuber with the growing tip facing upwards.
  5. Continue to fill in the rest of the compost to firmly hold the tuber, making sure the growing tip at the top is peeping out and is not completely covered. This is now ready to be moved to the patio or garden area, with access to as much sun as possible.
  6. Water well after potting, keeping the compost moist but not waterlogged, as the tubers will rot. Add a liquid feed weekly during the growing season and provide some protection from slugs as they have a strong love for Dahlias.
  7. If growing tall varieties, insert a cane to help with growth and to keep secure.
  8. Very little pruning is needed with Dahlias. However, you can deadhead as flowers begin to fade.

More Dahlia Tutorials

Dinner Plate Dahlias

Dwarf Gallery Dahlias

Cactus Dahlias

Bishop Dahlias

Valentine’s Day Flowers to Grow at Home

With Valentine’s Day on the horizon, there are flowers in every shop and supermarket. Why not grow your own for next year? Anyone can grow cut flowers! It’s a personal, economical and rewarding way to show love to your family and friends.

ROSES

Roses are the flower most associated with love and romance. In Shakespeare’s Romeo and Juliet, Juliet says to her lover “A rose by any other name would smell as sweet.” to express that love has no boundaries. The rose has also been England’s national flower since The War of the Roses in the fifteenth century.

Blue Moon

Rose ‘Blue Moon’ is an unusual icy-blue colour and have a lovely fragrance, which makes them an eye-catching addition to bouquets and displays.

Fragrant Delight

This stunning rose is one of the most popular variety of Floribunda! Its blooms are coppery peach-pink blossom in colour and are highly fragrant.

Scarlet Queen Elizabeth

This bold red rose produces glamorous scarlet flowers with a subtle fragrance. The gorgeous red colour is a classic for a Valentine’s bouquet.

DIANTHUS

The name Dianthus comes from the Greek words ‘dios’ (god’) and ‘anthos’ (‘flower’). The common name ‘Carnation’ was derived from the Latin word ‘incarnation’, meaning the incarnation of God. It symbolises admiration, passion, affection, love and gratitude. One of the world’s oldest cultivated flowers, the popularity of Dianthus has remained throughout many centuries.

Doris

This delicate pretty pink flower has a wonderful striped red centre which makes it stand out. Doris has a subtle fragrance and is ideal for a cut flower display.

Scent First Memories

Memories is a beautiful creamy white flower from our ‘Scent First’ range of Dianthus which produce amazingly fragrant flowers.

Valda Wyatt

Our Valda Wyatt produces frilly vibrant pink blooms and have a lovely scent. They make fantastic cut flowers and a bright addition to bouquets.

IRIS

The Iris’s history dates back to Ancient Greek times when the Greek Goddess Iris, the messenger of the gods and the personification of the rainbow, acted as the link between heaven and earth. It was said that the flowers had the power to bring bliss and favour to earth and the people living on it. They symbolise faith, hope, wisdom and royalty.

‘Dance Ballerina Dance’

Ths beautiful and easy to grow Iris produces brilliant lilac-pink petals with pale pink ruffled edges. The flowers stand on sturdy stems ideal for cut flower displays.

‘Beverly Sills’

This new germanica Iris produces an abundance of delicate coral-pink flowers. Paired with lance-shaped green foliage, it makes for a lovely cut display.

‘Concord Crush’

This Iris sibirica produces ruffled violet-blue flowers with a yellow centre on each petal. Their unusual markings and colour are a wonderful addition to bouquets.

JASMINE

The flower symbolises love, beauty, good luck and purity. Jasmine has always been considered a symbol of eternal beauty. In parts of India many people believe that jasmine can purify an individual, specifically when they grow into different life stages, which is why it is also symbolic of hope and spirituality. This makes it an ideal gift for a loved one, especially a partner.

Trachelospermum Pink Showers

This Star Jasmine produces delicate pink star-shaped flowers with a bright yellow centre. These blooms look dainty when clustered in a bouquet.

Nudiflorum

These bright yellow flowers are delicately small but pack a punch with their vibrant colour. They are highly fragrant and add a pop of colour to cut-flower displays.

Trachelospermum jasminoides

This highly fragrant Star Jasmine has crisp white petals and a vivid yellow centre. Due to their dainty size, they add a lovely whimsical look to bouquets.

DICENTRA

The Bleeding Heart plant symbolises speaking about your emotions, passionate love, compassion and unconditional love, and spiritual connection. This flower got its name from its peculiar appearance, so does its scientific name. Known as Dicentra Spectabilis which translates to two spectacular spurs. In literal translation it means two spurs worth looking at, which fits the flower beautifully as it really is eye-catching.

Spectabilis

This Dicentra variety produces show-stopping deep pink heart-shaped flowers, which ‘bleed’ white petals. Dicentra Spectabilis add a great splash of colour to bouquets.

Sulphur Hearts

This unique variety of Dicentra is a lovely golden yellow tipped with a soft lilac colour at the bottom. These flowers make a lovely centre point to a home-grown bouquet.

Valentine

This remarkable variety of Dicentra produces stunning red heart-shaped flowers with a white droplet hanging from the bottom. The classic shape is perfect for a Valentine.

Cut-Flower Garden Top Tips:

If space allows, dedicate a part of the garden to growing just cut flowers. The advantage of a cutting garden over picking from borders is that it avoids depleting beds and borders, as well as providing a more productive planned area for the cut flower gardener.

  • No room for a big garden? You can squeeze about 20 plants into a 3ft x 6ft raised bed.
  • Plant or sow in rows; this makes weeding, staking and picking a much easier task.
  • Pick your flowers often; the more you pick, the more flowers the plant will produce.
  • Enjoy the rewards of growing your own, personalised cut-flower displays!

July Plant of the Month – Scabiosa caucasica

Scabiosa caucasica

Scabiosa Mixed

Introduced to the UK over 200 years ago Scabiosa caucasia are a striking alternative to the sunny yellow, orange and red shades that tend to dominate the summer months. They become a beautiful sight once their amazing and colourful blooms appear during the summer, flowering perpetually from June through to the first frosts in autumn. They make excellent cut flowers, but left in the garden are highly attractive to butterflies and bees.

POTM July Scabiosa

 

 

 

 

 

 

Planting

Scabiosa like a sunny position. They will do best in temperate weather conditions, do not allow to get over wet in winter. In a really hot summer they can die back but as the weather cools towards October they may start to flower again. Extremely hardy and free flowering; they will thrive in most well drained soils – particularly good for chalky soil.

Aftercare

Deadhead to promote flowering. When established they will be more drought tolerant.

Will naturalise if left undisturbed making them a good addition to a wild garden.

Top Picks

Scabiosa Caucasica Snow Cushion

‘Snow Cushion’ is a mound-forming, deciduous to semi-evergreen perennial with broadly lance-shaped, variably-lobed, grey-green leaves and upright, wiry stems bearing semi-double, white flower heads from early summer into autumn.

This attractive perennial will produce pincushion type flowers from June through to late October. They are very hardy plants and free flowering, and Scabiosa thrive in most types of well drained soil.

Click HERE to view our full range of Scabiosa!