Help us achieve our goals:
make a donation »
Join the RHS today and
support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
Join the RHS today and support our charity
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records.
Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience.
When using this search
Search by plant name, key attributes or both to find plant details and a list of
AGM plants have been through a rigorous trial and assessment programme. They are:
© RHS 1999
the RHS today and get 12 months for the price of 9
Other common names
big-cone pine Coulter's pine
Pinus can be shrubs or large, evergreen trees, some species with attractive bark, developing an irregular outline with age and bearing long needle-like leaves in bundles of 2, 3 or 5; conspicuous cones may fall or remain on the tree for years
P. coulteri is a large evergreen tree with a broad, open crown. Stout shoots bear thick, blue-grey needles up to 35cm long, in bundles of three. Massive pale brown cones to 30cm long, with a spine on each scale
W California to Mexico
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Exposure Exposed or Sheltered
SoilSand, Clay, Chalk, Loam
pHAcid, Alkaline, Neutral
Higher than 12 metres
wider than 8 metres
Time to ultimate height
more than 50 years
Grow in any well drained soil in full sun
Propagate by seed sown in containers in a cold frame in late winter. Retain in pots for at least two years
Suggested planting locations and garden types
Pruning Generally no pruning required. Remove competing leaders and, on older trees, crown lift by removing some of the lower branches
Pests Pine adelgid and sawfly may occur
May be affected by honey fungus, various needle cast diseases and tree rust
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.
Like this page on facebook
Click on the Tweet button below to compose your tweet.
Join the RHS today and get 12 months for the price of 9