The National Plant Collection® of Polemonium, Collomia, Gilia and Leptodactylon (Polemoniaceae)

The National Plant Collection® of Hakonechloa

The National Plant Collection® of Fragaria vesca

The collection was recognised in 1992 where the Polemoniums were grown in a small garden in Ebchester, County Durham, UK. In 1998 the entire collection was moved twenty five miles east to Trimdon Grange, where the winds blow straight off the north east coast.The collection was awarded Scientific Status in 1999, one of only 35 of the 650 plus collections in the UK. The collection is run by a husband and wife team, David and Dianne Nichol-Brown, Dianne being the botanist with a first class honours degree in plant biology, a lecturer in ecology and conservation and an interest in the genus since 1985, David ensures that everything runs smoothly! and manages the family nursery;

The collection was awarded Scientific Status in 1999, one of only 35 of the 650 plus collections in the UK.

We have 70 plus species and cultivars in the Polemonium collection, with new cultivars being developed regularly. They range from 10cm Alpines to 120cm herbaceous and can be grown in a variety of locations including under conifers.

The plants are often incorrectly named by nurseries and seed suppliers, Mainly P. boreale, caeruleum and pauciflorum are sold under various names. In tests we have found approx 90% of all seed is incorrectly named, this includes seeds from some of the large reputable suppliers.

In 2002 the Collomia and Gilia were added to the collection, these require similar growing conditions to Polemoniums.

The Leptodactylons were added in 2003, these plants originate from California and require a sandy well drained soil. We have found these to grow well in wall pots in a sheltered spot.

November 2006, we were awarded collection status on our Hakonechloa(Japanese Forrest grass), not a relative of Polemoniums but require same growing conditions and they do look good together.


The National Council for the Conservation of Plants and Gardens Plant Heritage

plant heritage logo

The world’s leading cultivated plant conservation charity, bringing together the talents of botanists, horticulturalists and conservationists and the dedication of keen amateur and professional gardeners. Through a number of conservation projects, including the National Plant Collections and Threatened Plants Project, we are helping to safeguard our unique garden flora across Britain and Ireland.

To find out more visit NCCPG and our local group NCCPGNE

Copyright Polemonium Plantery 2017.