Overview
Primula denticulata is a rosette-forming, clump-forming perennial in the genus Primula, part of the Primulaceae family, with deciduous, semi-evergreen or evergreen; rosettes of crinkled or mealy leaves foliage. It typically grows around 0.3 m tall. Primula denticulata grows best in partial shade; alpines and auriculas take more sun, and tolerates fertile humus-rich loam; alpine kinds need gritty free-draining soil soils and neutral to slightly acid; asiatic species dislike lime pH. Its UK hardiness is rated H4-H7 depending on group. Suggested uses include rock gardens, borders, woodland gardens and alpine gardens. It is native to Asia.
About
Primula denticulata is a perennial in the Primulaceae that forms rosettes and clumps to about 0.3 m. It flowers in the UK from February to June. Leaves are crinkled or noticeably mealy and sit in basal rosettes. Different groups prefer either reliably moist soil or sharply drained, gritty conditions.
Wikipedia contributors, CC BY-SA 4.0 — Primula denticulata
About the genus
Primula is a genus of herbaceous flowering plants in the family Primulaceae. They include the primrose, a familiar wildflower of banks and verges. Other common species are P.
Wikipedia contributors, "Primula", CC BY-SA 4.0 — Primula
In the garden
Primula denticulata is a rosette-forming, clump-forming perennial native to Asia and belonging to the Primulaceae. Plants reach roughly 0.3 m and produce their flowering display from February to June. The foliage can be deciduous, semi-evergreen or evergreen, with crinkled or mealy-textured leaves in basal rosettes. Siting depends on the group you choose: most candelabra and woodland types favour a fertile, humus-rich loam that remains reliably moist, while alpine forms need a sharply drained, gritty mix. Aim for a neutral to slightly acid soil, as Asiatic selections generally dislike lime. Give plants partial shade in most situations; alpine and auricula-type selections tolerate and prefer rather more sun. Position where they are sheltered and on a north, east or west-facing aspect for best results. Hardiness ranges from H4 to H7, which translates as anything from average garden conditions through to very and fully hardy depending on the group. Use drumstick primulas in rock gardens, alpine beds, shaded borders or woodland plantings where soil moisture and drainage match the selection. Allow the rosettes room to form clumps and note the defined flowering window of February to June when planning a seasonal display.
Growing conditions
Best soil and position for Primula
- Sunlight
- Partial shade; alpines and auriculas take more sun
- Soil type
- Fertile humus-rich loam; alpine kinds need gritty free-draining soil
- Soil pH
- Neutral to slightly acid; Asiatic species dislike lime
- Soil moisture
- Reliably moist for candelabra and woodland kinds; sharply drained for alpines
- Aspect
- North, east or west facing
- Exposure
- Sheltered
- UK hardiness
- H4-H7 depending on group
Plant details
Primula denticulata size, habit and characteristics
- Plant type
- Perennial
- Habit
- Rosette-forming, clump-forming
- Foliage
- Deciduous, semi-evergreen or evergreen; rosettes of crinkled or mealy leaves
- Height
- 0.3 m
- Suggested uses
- rock gardens, borders, woodland gardens, alpine gardens
- Native to
- Asia
Care notes
Pruning and caring for Primula denticulata
- Cultivation
- Match the group to the site and these are easy plants; ignore the distinction and they are short-lived. Candelabra and sikkimensis types want ground that never dries, so a streamside or bog garden suits them perfectly, while auriculas and the alpine species need gritty compost, protection from winter rain, and are traditionally grown in pots in an open frame. Woodland primulas ask for nothing more than leaf mould and dappled shade.
- Pruning
- No pruning required. Deadhead to prevent self-seeding where it is not wanted, and remove dead outer leaves from the rosettes to reduce rot.
- Propagation
- Divide after flowering, ideally every second or third year, as congested rosettes decline. Seed germinates best sown fresh and given a cold period, and many species self-sow freely.
- Pest resistance
- Vine weevil is the principal enemy, especially in pots, along with slugs, aphids and red spider mite under glass.
- Disease resistance
- Prone to grey mould and crown rot in stagnant damp. Primula brown core, a root rot, causes gradual decline in long-established plantings.
Frequently asked questions
How do I grow Primula denticulata?
Match the group to the site and these are easy plants; ignore the distinction and they are short-lived. Candelabra and sikkimensis types want ground that never dries, so a streamside or bog garden suits them perfectly, while auriculas and the alpine species need gritty compost, protection from winter rain, and are traditionally grown in pots in an open frame. Woodland primulas ask for nothing more than leaf mould and dappled shade.
Where is the best place to plant Primula denticulata?
Primula denticulata prefers partial shade; alpines and auriculas take more sun. It suits sheltered positions.
What soil does Primula denticulata need?
Primula denticulata grows best in fertile humus-rich loam; alpine kinds need gritty free-draining soil soil. It prefers neutral to slightly acid; asiatic species dislike lime soil. Aim for soil that stays reliably moist for candelabra and woodland kinds; sharply drained for alpines.
How do I prune Primula denticulata?
No pruning required. Deadhead to prevent self-seeding where it is not wanted, and remove dead outer leaves from the rosettes to reduce rot.
How big does Primula denticulata grow?
Primula denticulata reaches a height of 0.3 m.
Is Primula denticulata hardy in the UK?
Primula denticulata has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.
How do I propagate Primula denticulata?
Divide after flowering, ideally every second or third year, as congested rosettes decline. Seed germinates best sown fresh and given a cold period, and many species self-sow freely.
More in the Primula genus
- Primula aurantiaca
- Primula burmanica
- Primula helodoxa
- Primula microdonta
- Primula waltonii
- Primula 'Asthore Hybrids'
- Primula 'Devon Cream'
- Primula 'Ravenglass Vermilion'