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Primula malacoides

Fairy primrose

Primulaceae

Yunnan and Sichuan provinces of southwestern China

Attracts Pollinators Fragrant (light)Container Friendly

SunPart Shade

WaterMedium

HardinessZones 8–11

Overview

Primula malacoides is a short-lived perennial grown as a cool-season annual, forming a basal rosette 8-12 inches (20-30 cm) across with flower stems 8-18 inches (20-45 cm) tall. Leaves are ovate to oblong, 2-4 inches (5-10 cm) long, light green, soft, and covered in short hairs, with scalloped and shallowly lobed margins on long petioles. Flower stems rise well clear of the foliage and carry 2-6 tiers of blooms, each tier a whorl of 6-12 flowers separated by 1-2 inches (2.5-5 cm) of bare stem, so the whole inflorescence reads as a series of stacked rings. Individual flowers are 0.4-0.6 inch (1-1.5 cm) across with 5 notched petals in pink, lilac, magenta, or white around a yellow eye, and carry a light sweet scent. Stems and leaf undersides are often dusted with white mealy farina. Flowering runs through winter and spring, and plants collapse once daytime temperatures hold above 75F (24C), which ends the display by early summer in most climates. Contact with the foliage causes skin irritation in some people, a reaction reported across the genus and most strongly in P. obconica. Outdoors it survives winter only in USDA zones 8-11.

Native Range

Primula malacoides is native to southwestern China, chiefly Yunnan and Sichuan provinces, where it grows in damp meadows, on stream banks, and in open woodland between 5,000 and 10,000 feet (1,500-3,000 m). It was introduced to European horticulture in 1908 from collections made in Yunnan. It is now grown worldwide as a winter pot plant and cool-season bedding plant rather than as a garden perennial.

Suggested Uses

Grown as a winter and spring pot plant in 4-6 inch (10-15 cm) containers indoors and in conservatories, and as cool-season bedding in USDA zones 8-11 at 8-10 inch (20-25 cm) spacing. It is combined with cyclamen, pansies, and spring bulbs in seasonal displays that are cleared before summer. Flowers are worked by early bees where plants are grown outdoors.

How to Identify

Flowers arranged in 2-6 separated whorls up a single slender stem, rather than in one terminal cluster or umbel, place the plant among the candelabra-type primulas and separate it from P. obconica and P. vulgaris. Leaves are soft, hairy, and shallowly lobed with scalloped margins, 2-4 inches (5-10 cm) long, and much thinner in texture than the puckered leaves of P. obconica. Flowers measure only 0.4-0.6 inch (1-1.5 cm) across, roughly half the width of P. obconica blooms. White mealy farina on the stems and leaf undersides rubs off on the fingers.

Appearance

Size & Dimensions

Height8" - 1'6"

Width/Spread8" - 1'

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~12 weeks

Winter Spring

Flowering runs from December to May under glass and from February to May in gardens in USDA zones 8-11, with each plant carrying 4-10 stems in succession over 10-14 weeks. Individual whorls open from the lowest upward, and a single stem stays in flower for 3-4 weeks. Bud initiation requires night temperatures of 50-60F (10-16C), so plants held warm through autumn flower late and sparsely. Flowering stops once daytime temperatures exceed 75F (24C).

Detailed Descriptions

Flower Description

Pink, lilac, magenta, or white with a yellow eye

Foliage Description

Light green

Growing Conditions

Sun Requirements

SunPartial Shade

Requires 3-5 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 7.0(Neutral)

357912

Soil Types

loam peat

Drainagemoist

Water & Climate

Water Needs

Medium

Frost Tolerance

tender

Care & Maintenance

Care Guide

Growth is steadiest in bright indirect light or 3-5 hours of morning sun, with shade from midday onward; direct afternoon sun bleaches the flowers and wilts the leaves. Soil or potting medium should be humus-rich, evenly moist, and free-draining at a pH of 6.0-7.0, since the shallow roots dry out within a day in small pots. Watering at the soil surface rather than over the crown keeps water out of the rosette, where standing moisture causes crown rot in cool conditions. Night temperatures of 50-60F (10-16C) and days below 70F (21C) sustain flowering; central heating above that range shortens the display to a few weeks. A dilute balanced liquid feed every 2-3 weeks during flowering maintains stem production, and aphids and vine weevil are the usual pests in protected growing. Plants are commonly discarded after flowering rather than carried through summer, as they rarely recover from heat.

Pruning

P. malacoides needs no structural pruning. Cutting each flower stem at its base once the top whorl fades directs energy into the next stems and keeps the rosette open. Removing yellowed outer leaves at the petiole reduces botrytis in cool humid conditions. Cutting into the crown itself kills the plant, since all growth comes from that single point.

Pruning Schedule

late spring