Thompson & Morgan

Important delivery notice
The products on this site are only delivered to UK addresses. If you require delivery to another country please visit one of our other sites below.

Refine Results

Refine by..

Email Newsletter

Sign up to our newsletter

Perennial & Biennial Plants


In this range you'll find an impressive selection of perennial plants and biennial plants, which are perfect for beginners and experienced gardeners alike. Also known as herbaceous plants, perennial plants live for 2 or more years and flower every year. Biennial plants live for up to 2 years, flowering profusely in their second year before setting seed and dying. Both are great for beds and spring displays and there are many delightful plants to choose from.


For beautiful summer flowers browse our range of annual plants.



We have found 4 products.
 

Pennisetum viridescens (Large Plant)

Fountain Grass

Fountain Grasses will always add a certain elegance to any garden, large or small. The evergreen leaves arch gracefully back to allow the tall stems of the flowerheads to push upwards. Atop each stem appear long, feathery plumes, each flushed with black, which will catch the wind and add movement to your display, or, if standing still will be an interesting and delicate architectural plant. Very easy to grow, Pennisetum viridescens, require very little looking after and can be used either as a specimen plant or as part of a grasses collection. Height: 100cm (39"). Spread: 100cm (39").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3.6 litre potted pennisetum plant

    • Despatch: Within 28 days
    •  
    • £12.99
    • 2 x 3.6 litre potted pennisetum plants

    • Despatch: Within 28 days
    •  
    • £19.99

Agapanthus 'Glenavon' (Large Plant)

African Blue Lily

A particularly pretty African Blue Lily that deserves a prominent spot in your garden. Agapanthus 'Glenavon' produces dense, rounded umbels of pale blue flowers with a violet stripe along each petal. The sturdy stems each rise to 1m (3') above clumps of linear, semi evergreen foliage that makes useful groundcover. This hardy perennial is tough and reliable, coping well in most soils and at its best in a sunny position. Plant it in large clumps toward the middle of borders for a superb impact from July to September. Height: 100cm (39"). Spread: 50cm (20").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 2 litre potted agapanthus plant

    • Despatch: Within 28 days
    •  
    • £17.99
    • 2 x 2 litre potted agapanthus plants

    • Despatch: Within 28 days
    •  
    • £27.99

Chrysanthemum 'Hardy Patio Mixed'

As the days shorten, these shimmering chrysanthemums come into their own. Bright colours and long-lasting blooms give a real boost to the autumn garden when many things are looking tired. This collection of hardy perennial patio Mums will reward you with rounded domes of colour from September right through until the first frosts. Superb for growing in borders and containers, and the sturdy stems make excellent cut flowers too. Our young plants are supplied as a mix of 4 named varieties. Height: 100cm (39"). Spread: 60cm (24").


Companion planting: Try growing Chrysanthemums with chives, whose aromatic leaves will deter aphids.


Useful links:

Companion Planting

More info
    • 5 chrysanthemum Postiplug plants - 1 of each colour

    • Despatch:
    •  
    • £9.99
    • Out of stock

Agapanthus 'Regal Beauty' (Large Plant)

African Blue Lily

The largest flower heads of any African Lily. Each globe of 'Regal Beauty' is almost 30cm (12") in diameter, and is made up of hundreds of inky-blue florets. Agapanthus is robust, easy to grow and long-lasting when planted in a mixed perennial border. African Lilies can also be grown in patio pots.

'Regal Beauty' has been selected for its enormous flower heads of almost a foot across, it's the perfect opportunity to show off to your gardening friends! Plants are a little less hardy than other Agapanthus, so may need some winter protection. Height: 1m (39"). Spread: 50cm (19").

 

Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer
More info
    • 1 x 3 litre potted agapanthus plant

    • Despatch:
    •  
    • £13.99
    • Out of stock
    • 2 x 3 litre potted agapanthus plants

    • Despatch:
    •  
    • £22.99
    • Out of stock