Latest AGM plants

Latest award-winning plants

Each month Graham Rice highlights one plant that has recently been awarded the RHS Award of Garden Merit (AGM). The AGM is the RHS seal of approval that a plant will perform well in your garden.

February: rhubarb chard 'Bali'
This attractive and high quality plant proved a star of the recent RHS trial.
Read more...

January: Indigofera 'Claret Cascade' Indigoferas are deciduous shrubby or semi-shrubby members of the pea family, mostly from warmer climates than ours. Read more...

December: broad bean 'Witkiem Manita'
Broad beans may not be an especially glamorous crop but they’re tasty, nutritious and easy to grow. Read more...
 

November: Lespedeza thunbergii subsp.thunbergii
Sometimes called bush clover, this will surely see wider recognition. Read more...
 

October: Lonicera 'Mandarin'
Honeysuckles are among the easiest to grow and most valuable of hardy climbers. Read more...
 

September: Weigela Wine and Roses ('Alexandra')
The time was just right for the RHS to run a weigela trial. Read more...
 

August: spring cabbage 'Advantage'
The adaptability of spring cabbage in its culinary use is invaluable.
Read more...
 

July: Roscoea auriculata
These perennials are shade-lovers that are still flowering when others are past their best. Read more...
 

June: Narcissus 'Elka'
This lovely trumpet daffodil was a star of the recent RHS trials at Wisley.
Read more...

May: Dianthus Capri 'Kocapri'
An unusually prolific carnation, that retains its colour whatever the season. Read more...

April: Iris 'Starwoman'
This exceptional iris has won the top award for irises in the United States.
Read more...
 

March: Alstroemeria 'Spitfire'
Alstroemeria ‘Spitfire’ has gained the prestigious AGM award for both its foliage and flowers. Read more...
 

February: Canna 'Bethany'
This is a dramatic and colourful plant, in both its flowers and foliage', says the trials team. Read more...
 

January: Iris sibirica
'Salamander Crossing'
Intriguing iris colours and combinations are now to be seen. Read more...
 

December: Spiranthes cernua var. odorata 'Chadd's Ford'
The RHS recently ratified the Award of Garden Merit to a hardy garden orchid. Read more...
 

November: Dianthus Lily the Pink ('WP05 Idare')
An outstanding plant, the assessment panel unanimously agreed on its award. Read more...

October: Dwarf French bean 'Scuba'
French beans are one of the most valuable crops for home-food growers. Read more...

September: Narcissus jonquilla var. henriquesii
In RHS trials this variety shone. Read more...

August: sweet pea 'Duo Salmon'
The combination of colour and fragrance of sweet peas are always an attraction to visitors at Wisley. Read more...
 

July: Winter squash 'Little Dumpling'
One of the stars of the winter squash trial in 2010 was 'Little Dumpling'. Read more...

June: Abelia x grandiflora 'Hopleys' This variegated plant proved hardy and flowered profusely in a five-year trial of nearly 50 abelias. Read more...
 

May: Dahlia 'Exotic Dwarf'
A double AGM winner - first for its performance in open ground and now as a container plant. Read more... 
 

April: Buddleja davidii Camberwell Beauty 'Camkeep'
This was a real star in the recent Buddleja trial at RHS Garden Wisley. Read more...


March: Carrot 'Parmex'
The early carrot is almost round in shape, has good flavour and is popular with the children. Read more...
 

February: Amaranthus cruentus 'Oeschberg'
Deep crimson flowers make this a bold focal point in the garden. Read more...

January: Bergenia 'Eric Smith'
From dramatic winter foliage to beautiful spring flowers,  this bergenia is outstanding. Read more...
 

December: Ipomoea lobata
Annual climbers don't receive the attention they deserve. Here's three spectacular plants. Read more...
 

November: Sweet pea ‘Cherub Crimson’
‘Cherub Crimson’ impressed on the Wisley trials ground. Read more...

 

October:  Chrysanthemum ‘Perry’s Peach’
‘Perry’s Peach’ opens its peachy pink flowers over a long period. Read more...

 

September: Kniphofia ‘Bees' Sunset’
‘Bees' Sunset’ was much admired in the Wisley trials. Read more...

 

August: Cortaderia selloana Silver Feather
Silver Feather is a pampas grass suitable for smaller gardens. Read more...

 

July: Begonia (Million Kisses Series) Devotion
Devotion is perfect for hanging baskets with bright red blooms. Read more...
 

June: Crocus 'Snow Bunting'
This little ivory crocus has been around since 1914, but it still one of the best crocuses around. Read more...
 

May: Dianthus Candy Floss ('Devon Flavia')
Candy Floss is fragrant and enjoys a long flowering season. Read more...