Under £20, Blue, Black, Borders, Perennial
Winner of The RHS Chelsea Flower Show 'Plant of the Centenary'. A celebrated Cranesbill producing masses of saucer shaped, violet blue blooms with dainty white centres. Repeat flowering throughout the summer, hardy Geranium 'Rozanne' makes excellent ground cover through… More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
6 Options From£6.99
by the end of july 2021
This magnificent mix combines blue Agapanthus 'Flower of love? and the first ever bicolour Agapanthus 'Twister' for a striking two tone display More Info
- Sun shade: sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
3 Options From£9.49
by the end of september 2020
Agapanthus africanus 'Twister'
Here's a plant that will stand out from the crowd in your garden - the first ever deciduous bicolour agapanthus. This African lily is robust, and truly hardy in the UK meaning it's perfect in the garden border as well as in a patio container. More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
5 Options From£9.49
within 21 days
For stunning, exotic looking blue and white blooms that burst at the end of tall stems like a fireworks in your flower bed, look no further than this amazing African Lily. An easy to keep variety that will get bigger and produce more flowers each year. More Info
- Sun shade: sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
3 Options From£10.99
by the end of september 2020
Eryngium planum 'Blue Hobbit' (Garden Ready)
Eryngium 'Blue Hobbit' is an unusual and striking plant with sprays of spikey electric blue flowers, with up to 100 on each plant. They are very adaptable and can grow in various types of soil, and also in patio containers. As a dwarf variety it has a compact habit that… More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£12.99
by the end of august 2020
The ever popular Nepeta 'Six Hills Giant' is one of the most commonly grown Catmints. The lilac-blue lavender-like flower spikes rise above the silvery-green foliage from early summer onwards, giving a delightful summer display, that is ideal for softening borders and… More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
3 Options From£9.99
within 14 days
Geranium bohemicum 'Orchid Blue'
Geranium 'Orchid Blue' is a selection by Thompson & Morgan from the species Geranium bohemicum. A short-lived border and ground cover plant which self-seeds to keep continuity. Masses of 2cm (0.75in) flowers of orchid-blue, veined in purple-violet, borne on bushy plants… More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£4.19
within 7 days
One of the most striking perennials for the border or patio containers. Giant, slender spikes of blooms reach skywards, in shades of blue and white. Plant in containers either side of your front door for a colourful box or bay tree substitute! More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£2.99
within 7 days
Agapanthus 'Ever Sapphire? is a semi-dwarf variety which produces multiple spikes of bright blue flowers all summer in a sunny or partly shaded position. Agapanthus are tough, fast growing and drought tolerant, these plants are a real 'must-have? for any style of garden… More Info
- Sun shade: sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
2 Options From£9.49
within 7 days
Coleus 'T&M Prize Strain Improved Mixed'
The sheer joy of this mixture is the wide and multiple colour range. It gives you so many different pot plants from one packet of seed and they couldn't be easier to grow. Superb house or greenhouse pot plant. Bedding plants for warm but shady positions. Height 45cm … More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£2.99
within 7 days
Sturdy and long-lived with huge flowers 10-12cm (4-5in) across in a wonderful blue, shot with violet on erect stems More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£3.99
within 7 days
Agapanthus are perfect for adding structure and colour to borders in summer. Their upright stems and rounded flower heads rise above clumps of strappy, dark green foliage. More Info
- Sun shade: sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
2 Options From£16.99
within 14 days
An architectural display of inky black flowers perch upon stiff, upright stems in early summer. The pointed buds droop demurely downwards as the flowers open, gradually colouring to a deep indigo-purple. More Info
- Sun shade: sun or semi shade
- Grows in: Borders
- Flower Colour: Black
- Longevity: Perennial
2 Options From£12.99
within 14 days
Sea Holly makes a superb hardy perennial for hot, sunny borders. Thriving on gritty soils, they are tough, resilient and reliable. This variety boasts a compact habit, and attractive, sculpted foliage. The silvery stems are topped with domed flowers and surrounded by a… More Info
- Sun shade: full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
2 Options From£15.59
within 7 days
Agapanthus Duo Fireworks & Poppin Purple
This superb duo of African Lilies brings together two exciting varieties. The bicolour blooms of Agapanthus ?Fireworks? compliment the dark blooms of Agapanthus 'Poppin' Purple' to perfection. Their rounded flower heads rise above neat clumps of narrow, strap-like… More Info
- Sun shade: sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
2 Options From£16.99
by the end of september 2020
Penstemon heterophyllus 'True Blue'
Yes, this really is a true blue Penstemon, true from seed! Azure blue trumpet blooms in abundance, with green and grey tinged foliage. An added bonus too - as this charming perennial may be treated as a annual, flowering in its first year. Highly versatile for borders,… More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£2.99
within 7 days
Delphinium grandiflorum 'Summer Nights'
Attractive dwarf plants covered in a blanket of dainty midnight-blue flowers. Flowering in their first year from sowing makes them perfect for bedding borders or containers, providing a colourful display over a long summer period More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£2.39
within 7 days
You may have heard this claim before, but this Pansy truly represents one of the most impressive black flowers in cultivation today. Bushy, compact plants bearing medium sized flowers, so black they shine like velvet. Height: 15-20cm (6-8 in). More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Black
- Longevity: Perennial
Just£2.99
within 7 days
Almost certainly the purest and deepest colour in existence. Lush, rich, broad leaves, like velvet, lightly serrated and nearly black in colour. Superb mixed with summer patio container plants More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£1.79
within 7 days
A truly wonderful agapanthus double act! Agapanthus 'Ever? Duo are semi-dwarf plants that produce multiple spikes of bright blue and pure white flowers all summer in a sunny or partly shaded position. Tough, fast growing and drought tolerant, these plants are a real … More Info
- Sun shade: sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£11.99
within 7 days
A neat, dwarf, bushy, habit, with large dense blue flower spikes, over a very long period. Quick to flower in 12-16 weeks from an April sowing. Ideal for borders and containers. Height: 30-40cm (12-16in) More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£3.29
within 7 days
Malva sylvestris 'Mystic Merlin'
A magical back of border plant with many large, silky blooms in shades from rich purple, through mauve, to the highly unusual and elusive blues. Flowers summer. Height: 150-180cm (5-6ft). Flowers in first year More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£1.79
within 7 days
Polemonium boreale 'Heavenly Habit'
Attractive clusters of violet-blue flowers, each with a distinct golden yellow eye, look divine against the bushy, deep green foliage. Their dwarf habit makes them idea! in the front of borders, or even containers. If deadheads are removed regularly, plants will… More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£1.79
within 7 days
The deep blue florets of Agapanthus 'Flower of Love' are some of the darkest in the genus. Set above lush evergreen foliage, the exotic blooms make a real statement in sunny borders and patio containers, returning each summer and getting better every year. Hardier than… More Info
- Sun shade: sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
2 Options From£9.49
within 7 days
Cichorium intybus 'Electric Blue'
The wild form of the vegetable Chicory makes a beautiful addition to a cottage garden border. Electric blue flowers are produced on the many, breezy stems throughout summer. Be quick to enjoy their beauty, as the flowers always close by midday! More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£4.79
within 7 days
Heteropappus meyendorfii 'Blue Knoll'
Seed of this amazing new garden plant can be sown early in the year* and by the same autumn will be completely smothered in hundreds and thousands of shiny, light reflecting flowers, forming perfect mounds (or knolls) 30cm (12in) high and 45cm (18in) across. During a… More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£1.79
within 7 days
Possibly the most beautiful Aquilegia of all. With glorious light to deep blue flowers 2-3in across sometimes fetching bi-coloured with white. An excellent border perennial, grand for cutting, in bloom for several weeks and will grow in sun or light shade. Flowers late… More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£2.99
within 7 days
Scabious 'House's Novelty Mix'
A truly elegant border perennial with blooms in blue, mauve and white on long slender stems which are much in demand for cut flowers. Flowers summer. Height 30in More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£2.99
within 7 days
Catananche caerulea 'Amor Blue'
This fabulous summer perennial provides a stunning blue accent to planting schemes, flowering on tall, upright stems throughout the summer months. Later, attractive seedheads form, prolonging the season of interest right into autumn. More Info
- Sun shade: full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£0.99
within 7 days
Primula capitata 'Noverna Deep Blue'
First year flowering. Attractive deep blue flower heads, held aloft by intriguing powdery white stems, above contrasting grey-green foliage. Adds an eye-catching display to borders and containers from summer into autumn. Height: 25-30cm (10-12in) More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£3.99
within 7 days
Silvery-green foliage which is scented unmistakenly of Aniseed. Flower spikes of blue appear during summer. Bees, butterflies and goldfinches love it! More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£3.29
within 7 days
Linum narbonense 'Heavenly Blue'
One of the finest blue flowered plants. A profusion of luminous ultra-marine blue flowers More Info
- Sun shade: Full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£3.99
within 7 days
Mr. Men™ Little Miss™ Salvia patens
Thank you for buying this packet of seeds! I know you'll enjoy growing them and that you'll love to see the colourful flowers growing in your garden or on your patio. Every packet sold will provide much-needed funds to this very worthwhile charity which supports… More Info
- Sun shade: full sun
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
Just£2.99
within 7 days
Creeping Phlox are useful for dry, sunny banks and all those places that other plants just won't grow! Plants produce an impenetrable mat of fragrant flowers; suppressing weeds and resisting drought! The detailed eye on each gleaming white is also quite striking! More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
2 Options From£17.99
within 14 days
Popular for its exquisite flowers, Passiflora caerulea is a vigorous semi-evergreen climber with attractive lobed leaves. From summer through to autumn it produces large white flowers with a fascinating structure, including a striking ring of blue-purple filaments. The… More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
3 Options From£11.99
within 14 days
* New in 2015If you are looking for a statement plant then try this big robust silver beauty! Easy to care for, the heavily silver-veined leaves will make a dramatic impact in borders and containers. Sprays of sky-blue flowers atop wirey stems will appear from spring. More Info
- Sun shade: Sun or semi shade
- Grows in: Borders
- Flower Colour: Blue
- Longevity: Perennial
2 Options From£9.99
by the end of september 2020
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