If your flowerbeds are looking a little bare, perhaps it’s time to add some colourful flowers and plants to your garden. At Capital Gardens, we stock a comprehensive range of premium seeds for all of your green-fingered needs – including flowers, plants, vegetables, herbs and fruit.

Seeds are available to buy in small batches, and come complete with full planting instructions as well as a guide on the best conditions for growth. Whether you want to add vibrancy to your garden with flowers or start growing your own vegetables, our affordable seeds can help you create a brighter, happier garden.

Plants and Flower

At Capital Gardens, we work with Suttons and Thompson & Morgan to bring you the very finest selection of flower and plant seeds for your garden. Whether you’re looking for hardy annuals, perennials or evergreens, we supply a great range of specially selected seeds that are available to buy online at affordable prices.

Add colour, texture and brightness to your garden with our fantastic range of seeds. Available in a diverse range of colours and variations, our seeds are easy to plant and garner excellent results when planted in the correct conditions. Many of the seed packs we offer feature a mixture of colours, so you can enjoy a greater range of colours in your garden.

Fruits and Vegetables

Or perhaps you’re interested in growing your fruits and vegetables? If so, we have a number of premium fruit and vegetable seeds that are easy to grow in a small allotment or vegetable patch. From leek and cabbage to carrots, tomatoes, courgettes, beans and chilli peppers – we have a wide range of vegetable seeds available to buy online. We also offer a range of exotic fruit seeds, including melon, pomegranate and a chinese yellow banana.

For additional information on buying and sowing seeds, contact the Capital Gardens team today on 01442 875 037.

  • Achillea Seeds Summer Berries Improved Suttons

    The Achillea ‘Summer Berries’ produces masses of tiny flowers that create flat plates of colour, balancing on tall stems amongst aromatic and feathery foliage. Low maintenance, this perennial is an explosion of late summer colour which will brighten up the back of any herbaceous border! They are easy to grow, and will thrive on even poor soil. Bred for their compact and hardy growing habit, they can also be used to encourage vital pollinating insects into your garden, like bees and butterflies. The vibrancy of colour also makes them spectacular cut flowers to enjoy indoors too.

    Sow your seeds from February to June, or September to October. Sow on the surface of good quality seed compost, and then cover with a sprinkling of compost or vermiculite. Place inside a polythene bag until after germination which will take up to three weeks. Light helps with germination so do not exclude any.

    When your seedlings are large enough to handle transplant them into 7.5cm pots and continue to grow in cooler conditions. When your plants are well grown, and there is no more risk of frost, gradually start to acclimatise them to outdoor conditions for up to 15 days before planting out. Plant at a distance of 60cm apart in full sun and well drained soil. Overwinter September sowings in a cold frame and plant them out before spring.

    Height: 60cm

    Spread: 60cm

  • Achillea Summer Berries Thompson & Morgan


    The Achillea ‘Summer Berries’ produces a mass of tiny flat flowers, that are held on tall stems above fragrant, feathery foliage. They are a low maintenance perennial that will provide an explosive display of late summer colour to brighten a herbaceous border.

    Easy to grow, they will even thrive in poor dry soils which makes them ideal within wildlife gardens where they will attract vital pollinating insects and butterflies. With a wide range of colours that will not only enliven your garden but that will also make a spectacular cut or dried flower.

    Sow in February to June, giving your seeds time to germinate before planting outdoors.

    Alternatively you can sow in September to October for a later bloom.

    Height: 60-75cm (24-30in).

  • Agastache Astello Indigo Thompson & Morgan

    The Agastache ‘Astello Indigo’ has received the Fleuroselect Gold Medal for its vigorous growth and compact habit. They bloom with extraordinary upright spikes that are covered in lost-lasting deep indigo flowers.

    Quick growing, they will flower within the first year of sowing. They will grow to a height of up to 60cm tall and spread up to 30cm wide. Statuesque and sturdy, the will not need staking and are perfect within a border or containers.

    The mint-scented flowers are irresistible to butterflies and bees and the mid-green edible foliage is highly fragrant.

    Easy to grow and care for, they will thrive in dry soils and sunny positions. Sow your seeds in early February to March under glass and they will flower in later summer. Alternatively sow in April to June and they will flower in early summer the following year.


  • Agastache Fragrant Mixed Thompson & Morgan

    A truly amazing display of tall, brightly coloured spikes of tasselled florets appear to burst out like flames from the lanced and highly perfumed foliage. Very quick and easy to grow, this lovely perennial will enhance your borders and containers, whilst its balmy fragrance will attract insects away from your summer patio! Excellent first year flowering variety.

    Height: 50-60cm (20-24in).

  • Ageratum Blue Mink Thompson & Morgan

    The Ageratum ‘Blue Mink’ produces a wealth of fluffy, powder-blue flowers. A pop of colour which contrasts perfectly against its compact, and uniform foliage.

    One of the most popular of the flossflower variety, ideal for patios, beds and borders, they are also the perfect plant to encourage bees and butterflies into your garden. Give a bit of texture as well as colour to your garden this year!

    Vigorous and hardy, the Ageratum ‘Blue Mink’ should be sown from February until mid spring (April) in good seed compost.

    Sow seed on the surface of your compost and gently firm down. The germination period will take up to 15 days. Be sure to keep the soil damp, but not wet and do not exclude any light.

    Once the seedlings are large enough to be handled, transplant and grow them in cooler conditions- until they are large enough to plant outdoors.

    Acclimatise your Ageratum to outdoor conditions for roughly 10 days- only once the risk of frost has passed.

    Position in full sunlight, in fertile and well drained soil, with a distance of up to 30cm apart.

    Height: 30cm

  • Ageratum Seeds Blue Mink Suttons

    The Ageratum ‘Blue Mink’ is an old variety of flossflower that remains popular today, and for good reason. Compact and uniform, the plant bears large and fluffy, powder blue flowers with a vigorous and open habit. Perfect for adding texture and colour to beds, borders or containers. They are also wonderful for attracting pollinating insects into your garden.

    Sow from later winter to mid spring at a temperature of 15-18C in good quality seed compost.  Sow on the surface of your compost and firm down gently. Keep your soil moist but not wet and do not exclude any light. Germination will take from 10-15 days.

    When your seedlings are large enough to handle, acclimatise them to the cooler outdoor conditions for up to 10 days before planting out. Transplant outdoors in a sheltered and sunny position with moist and well drained soil at a distance of 15-30cm apart.

    Height: 30cm

    Spread: 30cm

  • Ageratum Seeds Timeless Mix Suttons

    The Ageratum is a classic mix of flossflowers in shades from pink and lavender through to deep purple, white and blue. They are weather resistance, with powder puff blooms that are supported on tall and long stems. Perfect for filling in gaps in you borders, adding height and texture to informal planting schemes. A wonderful addition to wildlife borders, they are particularly eye catching.

    Sow from late winter to mid spring at 15-18C in good seed compost. Sow on the surface of good quality compost and gently firm down. Keep your soil damp but not wet and do not exclude any light as this will help with germination. Germination takes up to 15 days. When your seedlings are large enough to handle, transplant them and grow on in cooler conditions until they are large enough to grow outdoors. When your plants are more established, and there is no risk of frost, acclimatise your plants to outdoor conditions for up to 10 days. Plant out in a sheltered and sunny position with fertile and well drained soil at a distance of up to 30cm apart.

    Height: 50cm

    Spread: 30cm

  • Agrostemma Ocean Pearl Thompson & Morgan

    The Agrostemma Githago, also referred to as ‘Ocean Pearl’ and ‘Corn Cockle’ were originally bred by Thompson & Morgan. The tall and statuesque ‘Ocean Pearl’ bears unusual, large blooms in pure white with distinctive speckled markings at the base of each petal. They are an easy to grow annual that thrives on poor soils. The beautifully delicate and attractive flowers will also attract bees and butterflies into your garden, and if you plant more than you need you can have them as wonderful cut-flowers too. Sow from March until May, and you will be able to appreciate their beautiful display from June until August and will grow to an eventual height of up to 60cm and spread of up to 30cm.

    Sow directly outdoors in a position with full sun and well drained soil which has been raked to a fine tilth. Sow the seeds thinly at a depth of up to 12mm in drills spaced 30cm apart. Then cover the seed to exclude light. Water regularly.

    The germination period should take between 7 to 14 days, and once the seedlings are large enough to handle, thin them out to 30cm apart.

  • Alchemilla Mollis Thompson & Morgan

    The Alchemilla Mollis is a beautiful and useful perennial that will make a wonderful addition to any garden. Featuring scalloped, bright green leaves which will catch droplets of water. From June to September they produce a haze of tiny yellow flowers. They are incredibly alluring when planted en masse as ground cover or as edging along paths. Tolerant of a wide range of conditions, including heavy clay, and are drought tolerant once established. The name ‘Alchemilla Mollis’ is taken from the Arabic meaning ‘Little Magical One’ because the water collected on the leaves after morning dew was said to have healing properties.

    Cut back the faded flowers and foliage in August and the plant will produce a second flurry of flowers. They have a tendency to self seed, so removing the seedheads  carefully after flowering will minimise the spread.

    Height: 60cm

    Spread: 75cm

  • Alstroemeria High Society Mix Seeds Suttons

    The Alstroemeria features groups of rose, pink, yellow and orange flowers on tall stems. Perfect within cut flower arrangements, the exotic trumpet shaped blooms will stand striking and tall within a garden bed or border.

    Drought resistant, this hardy perennial should be sown from May to June in a position that receives full sun to partial shade, on good quality well-draining soil either in your garden on in a greenhouse.

    Germination can be sporadic, and your beautiful Alstroemeria will give a wonderfully display when they start blooming from June until August.

    Height: 60cm

    Spread: 60cm

  • Alyssum Avalanche Thompson & Morgan

    The Alyssum ‘Avalanche’ is a sweetly scented annual that forms a carpet of snow white flowers. With a vigorous growing habit and uniform flowers the ‘Avalanche’ blooms early and continues to bloom throughout summer. Perfect for creating a refreshing and clean display of pure white within bright display beds, borders, rockeries or patio containers. Low maintenance and hardy, the toughness of this plant contradicts its delicate appearance. As they are low growing ‘Avalanche’ is very wind tolerant and is ideal as ground cover.

    Sow your seeds from late March to early May at a temperature between 15C and 29C on the surface of good quality seed compost and gently firm down.

    Keep the soil moist and be sure not to exclude any light. Place in a propagator or within a polythene bag until germination is complete, which can take up to 30 days. Once the seedlings are large enough to handle, transplant and grow them in cooler conditions until they are large enough to be planted outdoors. Plant outdoors once the risk of frost has passed, but acclimatise them before putting them in the ground for at least 7 days before. Alternatively sow outdoors in May directly into a well prepared seed bed.

    Plant in full sun with well drained soil.

    Height: 6cm

    Spread: 25cm

  • Alyssum Carpet Of Snow Thompson & Morgan

    The Alyssum ‘Carpet of Snow’ is a wonderful wide-spreading and low-growing hardy annual that produces an abundance of snow white flowers all summer long. Early blooming, ‘Carpet of Snow’ hugs the ground making them perfect for rock gardens or cascading down crevices in walls.

    Their delicate appearance belies their tough and hardy nature. They will also encourage pollinating insects into your garden. Low growing and wind tolerant ‘Carpet of Snow’ makes a useful ground cover plant within beds, borders, or patio containers.

    Sow indoors from March at a temperature of 15-29C on the surface of good quality seed compost and firm down. Keep the soil damp but not wet and do not exclude light. Place in a propagator or in a sealed polythene bag and leave to germinate, which will take up to 30 days. When the seedlings are more established and large enough to transplant, grow in cooler conditions until they are big enough to plant outdoors, after the risk of frost. Acclimatise your seedlings for up to 10 days before planting outdoors. Then transplant outdoors in full sun and well drained soil.

    Alternatively so directly outdoors in May, in well prepared seed beds.

    Height: 10cm