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Home > 'Blue Perennials'

'Blue Perennials'

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, rockeries,More Info

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Catananche caerulea

An easy to raise, free flowering plant for the front of the border. The brilliant sky blue flowers are freely produced and are excellent for cutting, lasting a long time in water. They can also be dried for winter decoration. Will flower the same year from a late winter sowing. FMore Info

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Commelina dianthifolia

A very rare plant indeed. This is one of the few plants with such intense blue flowers and that will also perform well in the garden. Flowering in its first year with 25cm (1in) gentian blue flowers, it then produces tubers and springs back to life the following year with an unceMore Info

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Eryngium alpinum 'Blue Lace'

A spectacular alpinum selection with impressive long lasting clear violet-blue terminal flower heads on stunning blue stems. Makes an eye-catching addition to any border, and an attractive cut flower. Height: 85cm (34in)More Info

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Salvia transylvanica

Effective blue border plantMore Info

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Eryngium planum

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Passiflora caerulea

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 blooms areMore Info

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Tall Perennial Mix

Perennials will fill your borders with colour, grace and elegance for many years with the minimum of maintenance. Some will even flower in their first year. To help you make the most of your borders, we have grouped together varieties that can be sown in June or July by height toMore Info

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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 continue to floweMore Info

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Meconopsis betonicifolia 'Blue'

Is there a more beautiful bloom in the entire flower kingdom then the famous Blue Poppy? It is only to be expected that an elusive, magical flower like this is a little harder to grow. The secret with this plant is to grow cool and well shaded. Height: 60-90cm (24-36in)More Info

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Vinca major 'Variegata'

Vinca major 'Variegata' certainly lives up to its name, with outstanding evergreen variegated foliage; each deep green leaf features a fabulous contrasting creamy white margin. Also known as Variegated Greater Periwinkle, this plant is just as vigorous as Vinca minor but less aggMore Info

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Salvia patens

A classic border plant, ideal for adding a cool blue drift to your planting schemes. The attractive, large blue hooded florets are borne on erect stems above toothed foliage. First year flowering, blooms throughout the summer into autumn. Height: 45-60cm (18-24in)More Info

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Agapanthus 'Brilliant Blue'

Agapanthus 'Brilliant Blue' lives up to its name, with dazzling azure flowers, borne upon stiffly upright stems. The mid green, strap-like leaves form neat clumps of slender foliage that make superb ground cover when grown in dense groups. This exquisite African Lily is a real heMore Info

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Nepeta transcaucasica 'Blue Infinity'

Tall wands of violet-blue flowers in seemingly infinate quantity over a long period. With its characteristic aromatic fragrance it is extremely effective in the border, long-lived, easily grown and very reliable* Seed came to T&M under this name which is yet to be verifiedMore Info

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Meconopsis betonicifolia 'Blue'

Meconopsis betonicifolia - a stunning blue Himilayan Poppy that will certainly make an impact on its own, let alone as part of this collection. The large bowl shaped blooms will have a dramatic effect and are certainly worth a place in your garden. Add some luxury to your borderMore Info

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Gentiana cruciata

This much-loved flower of the high mountains makes a great feature at home in a rockery, alpine border or a container. Gentiana cruciata bears its intensely blue flowers at the tips of short, 30cm (12) stems. This Crosswort Gentian is the easiest to grow of all the Gentian familyMore Info

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Eryngium planum 'Blue Hobbit'

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 is very lMore Info

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Agapanthus Blue & White Collection

This magnificent mix combines blue Agapanthus 'Queen of the Ocean' and white Agapanthus 'Polar Ice' for a striking two tone display. In summer, these impressive perennials lend their stature to borders and patio containers, where their architectural seed heads continue the displaMore Info

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Aquilegia caerulea

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 spring/earMore Info

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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. Makes aMore Info

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Hosta 'Great Expectations'

Charles Dickens himself would have been delighted to learn that his classic novel shares its name with this fantastic hardy perennial. Hosta 'Great Expectations' has stiff, heart shaped foliage, the variegated leaves of which consist of splashes of yellow and green. This varietyMore Info

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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 season whenMore Info

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Linum narbonense 'Heavenly Blue'

One of the finest blue flowered plants. A profusion of luminous ultra-marine blue flowersMore Info

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Viola sororia 'Freckles'

Viola sororia 'Freckles' is quite unlike any other variety, bearing violet-purple, speckled flowers from spring through into summer. These unusual blooms are held above neat clumps of deep-green, heart-shaped foliage. A memorable Violet, 'Freckles' self-seeds freely, dotting itsMore Info

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Tradescantia (Andersoniana Group) 'Mixed Colours'

Quick forming clumps of fleshy sword-like foliage and a succession of clustered blue, lilac and mauve flowers. Very hardy and trouble-free in the borderMore Info

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Strelitzia 'Bird of Paradise'

* New in 2015Admired for their exotic blooms which make vibrant, long lasting cut flowers. The stately blue green, deeply ribbed foliage makes an attractive foil for their magnificent flowers which resemble birds with bright plumage. The striking blooms will make for an impressivMore Info

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Campanula pyramidalis (Mixed)

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

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Iris 'Edith Wolford'

We cannot sing enough praise of this stunning bicoloured iris, with the harmonious combination of bicolour blue and yellow blooms, you'll enjoy up to nine buds per stem on this hardy perennial. And just when you think this stunning iris has done its thing for the season it will rMore Info

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Agapanthus 'Northern Star'

Agapanthus 'Northern Star' is very free flowering, forming masses of umbel flower heads all through summer. The stunning deep blue flowers have a purple stripe the same as the purple base of the semi-evergreen foliage. A tall African Blue Lily, ideal in the middle of your garden'More Info

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Geranium 'Rozanne'

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 the frontMore Info

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Hardy Geranium Collection

Collection comprises of 1 bare root plant each of Sanguineum, Sanguineum Album, Sanguineum Canon Miles, Sanguineum Max Frei, Sanguineum New Hampshire & himalayense. Plus, 100g of geranium fertiliser.More Info

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Penstemon heterophyllus 'Electric Blue'

Intensely blue flowers with a tinge of purple contrast beautifully with the silvery green foliage of this hardy perennial. The long lasting blooms of Penstemon heterophyllus ?Electric Blue? appear from June through to October enticing plenty of pollinating insects to your garden.More Info

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Meconopsis grandis

Sturdy and long-lived with huge flowers 10-12cm (4-5in) across in a wonderful blue, shot with violet on erect stemsMore Info

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Nepeta nervosa 'Blue Moon'

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

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Echinops ritro

Make a strong statement with this architectural plant, it will be a great contrast with the more traditional softer flowers in your garden designs. The stand-out features are the spiky globes of electric blue flowers that stand proudly on silvery green stems above deeply cut spinMore Info

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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

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