Polyanthus primrose
Primula x polyantha · Primulaceae Popular
Large, bright flowers in almost every colour, most with a yellow eye, in clusters on a single stout stalk above a rosette of crinkled leaves.
- Size
- 8 in tall, 10 in wide
- Zones
- 4 to 8
- Light
- Part sun to part shade
- Flowers
- Late March to mid May
- Pets
- Toxic (mild)
- Job in a bed
- Edging
A bed built around polyanthus primrose
The planner designed this bed around polyanthus primrose when this page was made: a 12 × 6 ft (3.7 × 1.8 m) English border in zone 6, part sun. It chose the other plants from the 708 that suit those conditions, and says below why polyanthus primrose stands where it does.
The plants
- 1 Polyanthus primrose × 13, yellow
- 2 Blue star creeper × 19, blue
- 3 Turtlehead 'Hot Lips' × 5, pink
- 4 Garden phlox 'David' × 3, white
- 5 Inkberry 'Gem Box' × 1, dark green leaves
- 6 Autumn moor grass × 3, cream
- 7 Giant snowdrop × 12, white
Why this plant
- The only yellow. The one hot colour: every other flower here is cool or neutral.
Why here
- On the front edge. At 8 in it frames the bed without hiding it, and it is in leaf all season. It finishes 52% of the edge.
- 13 plants in 3 runs (5, 5 and 3). Runs of different lengths make the edge a frame, not a ruled line.
Why now
- In flower for 8 weeks. From late March to mid May.
- Fills a gap. For 8 of those weeks nothing else on the plan is in flower.
Planned as an English border: 6 of the 7 groups (86%) are drifts, longer along the bed than they are deep. The scheme leans cool (blue and pink) and uses yellow for warmth, with white and cream to calm things between them. Not everything here depends on flower: inkberry 'Gem Box' earns its place with leaves.
The planner's own design check: 12 Excellent, 5 Good. It flags one thing to watch: Nothing on this plan is highly poisonous or an aggressive spreader.
Open this bed in the planner Change its size, the sun or the style, move plants about, or swap one for another.
Where polyanthus primrose goes in a border
At 8 in it belongs at the front of a bed. In the planner's ten height classes it is low (6 to 12 in).
Its job: edging. A low, neat plant used in short runs of three or five along the front to finish the edge (or, in a formal bed, in one even row).
The primrose of spring bedding and supermarket pots. Planted out in cool, moist, part-shaded soil and divided every other year, it is a true perennial.
- Spring bedding and containers
- Edging a shady path
- Early colour with bulbs
What to plant with polyanthus primrose
Plants recorded as good partners for it, and what each pairing does:
- Daffodil 'Tete-a-Tete': purple against yellow, opposite each other on the colour wheel, if you choose those colours, in flower together for four weeks.
- Grape hyacinth: blue against yellow, opposite each other on the colour wheel, if you choose those colours, in flower together for four weeks; spires rising out of its mound.
- Lenten rose: purple against yellow, opposite each other on the colour wheel, if you choose those colours, in flower together for seven weeks; bold leaves against its medium ones; tall enough (18 in) to stand behind it.
Questions about polyanthus primrose
Does polyanthus primrose need sun or shade?
Polyanthus primrose grows in part sun (4 to 6 hours of sun, including some afternoon sun) and part shade (2 to 4 hours of sun, mostly in the morning).
It wants soil that stays evenly moist, rich in organic matter, and a good soak in dry spells.
What zones does polyanthus primrose grow in?
USDA zones 4 to 8. It is hardy to zone 4, which means it survives winter nights down to about −20 °F (−29 °C).
Above zone 8 it struggles: the zones measure winter cold, but a plant's top zone usually means the summers are too hot or the winters too mild for it to rest.
Gardening in Canada? Use the USDA zone for your town: Canada's own zone map uses different numbers.
When does polyanthus primrose flower in my zone?
In zone 5 it flowers late March to mid May. As a spring flower it moves about a week for every zone: earlier where it is warmer, later where it is colder.
| Zone 4 | Early April to late May |
|---|---|
| Zone 5 | Late March to mid May |
| Zone 6 | Late March to early May |
| Zone 7 | Mid March to early May |
| Zone 8 | Early March to late April |
Worked out from Hopkins' bioclimatic law: spring arrives about four days later for each degree of latitude north, and one zone is roughly two degrees. A warm spring or a cold one moves any garden two weeks either way.
How far apart should polyanthus primrose be planted?
8 in (20 cm) apart, from the middle of one plant to the middle of the next. That is a little closer than its full width of 10 in (25 cm), so a group knits into one patch.
It grows 8 in (20 cm) tall. Give it the full distance from anything taller, or it will lean out towards the light.
How many polyanthus primrose plants do I need?
At 8 in apart, set out in staggered rows:
- 27 to fill 10 square feet (about 1 m²)
- 16 for a single row 10 ft (3 m) long
- 86 to fill a 4 × 8 ft bed on its own
In a mixed border, plant it as runs of three or five along the front (or one even row, in a formal bed).
In the bed above, the planner used 13 in three groups.
Is polyanthus primrose poisonous to dogs and cats?
Yes: mild toxicity to dogs, cats and horses. Can cause mild vomiting in pets if eaten.
Rated from NC State Extension and the ASPCA. Where references disagree, the more cautious rating is used.
Is there a pet-safe plant like polyanthus primrose?
These come closest to doing what polyanthus primrose does, and no toxicity is recorded for them:
- Horned violet: the same job in a bed, the same size and the same colour; flowers mid April to late June.
- Mouse-ear coreopsis 'Nana': the same job in a bed, the same size and the same colour; flowers early May to mid June.
- Carpathian bellflower 'Blue Clips': the same job in a bed and the same size; flowers late June to late August, blue, not yellow.
Matched the way the planner's Swap button matches plants: the same job in a bed, then size, then flowering time.
Do deer eat polyanthus primrose?
They may. NC State does not list it as resistant to deer or rabbits. Where they visit, protect it, or plant it among ones they avoid.
What flowers after polyanthus primrose?
Polyanthus primrose is over by mid May. These start as it finishes and carry the same spot on, so it never goes flat:
- Sweet woodruff: from early May to early June, 8 in tall.
- Lady's mantle: from late May to early July, 18 in tall.
- Columbine: from early May to mid June, 24 in tall.
What does polyanthus primrose look like in winter?
Polyanthus primrose holds some of its leaves into winter, more in a mild year or a sheltered spot, and they look tired by March. Cut the old ones off as new growth starts.
Is polyanthus primrose good for bees and butterflies?
Polyanthus primrose is visited by pollinators and butterflies.
More Primula
- Cowslip Primula veris
- Drumstick primrose Primula denticulata
- English primrose Primula vulgaris
- Japanese primrose Primula japonica
- Orchid primrose Primula vialii
- Siebold's primrose Primula sieboldii
In these guides
- Garden plants toxic to cats
- Garden plants toxic to dogs
- Plants for butterflies
- Low plants for the front of a border
- Plants with blue flowers
- Plants for a white garden
Every fact on record
- Type
- Perennial
- Size
- 8 in (20 cm) tall, 10 in (25 cm) wide
- Plant
- 8 in (20 cm) apart
- Height class
- Low (6 to 12 in)
- Place in the bed
- Front
- Flowers
- Late March to mid May; dense clusters; yellow, red, pink, purple, blue, white
- Leaves
- Medium texture, semi-evergreen; green
- Shape
- Mounding, clumping
- Hardy in
- USDA zones 4 to 8
- Light
- Part sun, part shade
- Soil
- Rich, evenly moist
- Water
- Moderate
- Feeding
- Light, in spring
- Family
- Primulaceae
- Comes from
- Hybrid origin
- Attracts
- Pollinators, butterflies
Checked against NC State Extension and ASPCA poison lists. Flowering times are for zone 5: later in colder zones, earlier in warmer ones. Toxicity and spread information is a general gardening guide, not veterinary or medical advice, and invasive status varies by region. If a person or pet eats a plant, contact poison control or a vet. Check your local invasive species list before planting anything with a spread warning.