Primula japonica 'MILLER'S CRIMSON'

Primula japonica
Primula japonica 'MILLER'S CRIMSON'
Japanese primrose
SIZE/TYPE low perennial
USUAL WIDTH 0.2-0.3m
LEAVES deciduous broadleaf
COLOUR OF LEAVES light green
COLOUR OF FLOWERS +multicolored:deep red and red
LOCATION semi-shade to shade
USDA zone (lowest) 4   (down to -34°C)
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
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Japanese primrose was introduced to Europe and The British Isled around late 19th century. It is a herbaceous perennial which quickly became a popular plant and naturalized in British woodlands mainly thanks to ideal growing conditions: evenly moist weather and soil almost all year round.

Miller's Crimson is one of the top varieties of Japanese primrose which received RHS's Award of Garden Merit. It makes 30-50 cm tall bare stems with an umbel of rich crimson red flowers from early May until June (so-called Candelabra type). Their colour is rich like royal velvet and beautifully contrasts with lush, large, light green foliage. The leaves are broadly lanceolate or obovate and have serrated margins. Cutting back flowered stems immediately after flowering brings another blooming on shorter stems in autumn but prevents from self-seeding which is ideal for natural multiplication.

Japanese primrose is found in poorly drained, humus-rich soils of acidic to neutral pH, in shaded woodlands at river banks and on boggy locations. In your garden you have to imitate such conditions if you are looking for a profusely flowering and healthy plant. It can grow in full sun only if the soil is constantly moist or even wet. It is short-lived and is supposed to self-seed, or you can re-plant it every 2-3 years for rejuvenation. It is hardy to about -34°C (USDA zone 4).

Last update 02-01-2015

  • STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
  • DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
  • EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
  • STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
  • HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
  • SHRUB - a woody plant with branches growing bushy from the ground level.
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  • GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
LARGE PLANTS over 150 cmspecimens, screening and hedging shrubs

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