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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:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
© Janet Cubey & Wolfgang Bopp 2000
the RHS today and get 12 months for the price of 9
Other common names
giant herb robert
Geranium can be annuals, biennials and perennials, herbaceous or evergreen, with rounded, usually palmately lobed or divided leaves, and lax inflorescences of rounded, 5-petalled flowers
G. maderense is a robust but short-lived evergreen perennial or biennial to 1.5m, with attractively dissected leaves to 20cm in length and large panicles of purplish-pink flowers 4cm across, with darker centres
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or North-facing or West-facing or East-facing
Exposure Exposed or Sheltered
SoilChalk, Clay, Sand, Loam
pHAcid, Alkaline, Neutral
Time to ultimate height
Grow outdoors in well-drained soil in either sun or shade in frost-free area. Grow under glass in loam-based compost with added sharp sand in bright filtered light. Remove flowered stems and old leaves to encourage the production of new leaves and flowers
Propagate by seed, division or take basal cuttings
Suggested planting locations and garden types
Cottage & Informal Garden Mediterranean Climate Plants
Pruning No pruning required
Pests Generally pest free
May be affected by a downy mildew and powdery mildews
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
giant herb robert
Buy from £9.99 at the RHS Plants Shop
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.
Join the RHS today and get 12 months for the price of 9