All plants are sold in at least 9cm pots, NOT tiny plug plants!

Penstemon 'Sour Grapes'


Plant Information

Aspect: Full Sun
Aspect: Light/Partial Shade
Soil Type: Most Types
Colour: Purple

A tall and vigorous border penstemon with flowers of soft purple for a long period in summer and autumn. Thought to have been introduced by Margery Fish.

This is the rare, correct 'Sour Grapes'. Many nurseries wrongly sell as 'Stapleford Gem' as Sour Grapes. This seems to be a mix up due to an honest mistake at the Beth Chatto nursery several decades ago. We sell this both because they are both wonderful Penstemons.

'Sour Grapes' has been given the RHS Award for Garden Merit.

Loved by bees.

Hardy in all but the harshest winters.

Height: 75cm

Penstemons really are fantastic plants for any border. They don't seem to suffer from any pest or disease and even the slugs avoid them. On top of that, they flower for months on end, right into autumn when many other plants have given up for the winter. They look equally at home in a traditional cottage garden bed, or a stylish modern design.

Penstemons can be divided into roughly two types. Border hybrids, which grow to between 60 and 80cm and are very colourful, and species Penstemons which are usually lower growing with smaller flowers. Nearly all originate from North America. Border hybrids tend to flower from June to October and species for a shorter period, earlier in the season.



  • All our plants are hardy and perennial (come back year after year) unless otherwise specified in the description.
  • Every plant we sell is sold established in at least a 9cm pot, although many are in bigger pots. Unlike some nurseries, we do not sell plug plants because these require ongoing care when you receive them. Our plants can be planted in your garden as soon as you receive them, or they can be left in their pots for several weeks until you are ready to plant them.
  • As we grow everything ourselves and cannot just buy more stock when levels are low, there will be times when certain varieties are unavailable until the next batch has grown on.
  • We are not technically 'organic' but, as far as possible, we limit the use of pesticides and chemicals. We are fortunate enough to be situated in the countryside and we enjoy the environment and natural world that surrounds us, so we do what we reasonably can to protect it.
  • For a limited time we are offering free delivery for orders over £50.
If you have any questions about our plants, please feel free to contact us and we'll be happy to help.