What kind of herbaceous plant is the four-season primrose?

Introduction to the Four-Season Primrose

[Aliases] Four-season primula, Hubei primula, crane lotus

[Classification] Primulaceae, genus Primula

[Origin] Native to western China, now widely cultivated.

[Habits] Likes light but fears strong light; fears heat; prefers acidic, fertile leaf mold.

Morphological Characteristics of the Four-Season Primrose

The four-season primrose is a perennial herbaceous plant with a short stem about 30 cm tall, brown in color. It has many fibrous roots. The leaves are basal, oblong to ovate, with long petioles and shallow notches along the edges; the leaf surface is smooth, while the underside is densely covered with white soft hairs and often bears an irritating, toxic secretion. The scape is drawn out from the leaf cluster; the umbel is relatively large, the calyx is funnel-shaped, and the corolla is red. There are many cultivars with bright colors, including white, magenta, purple-red, blue, light red or light purple. The seeds are tiny and turn brown when mature.

Varieties of the Four-Season Primrose

The varieties of the four-season primrose include the large-flowered variety, the deep red-flowered variety and the white-flowered variety, and among cultivated varieties there are also double-flowered ones. As potted plants of the same genus, commonly seen ones also include Primula tibetica, Primula malacoides, Primula floribunda, Primula vulgaris, Primula kewensis and others.

The genus Primula has more than about 450 species, mainly distributed in the Northern Hemisphere. China produces about 390 species, mainly in the west and southwest, especially in cool, humid areas of low latitude and high altitude, and most species have large, brightly colored flowers.

Habits of the Four-Season Primrose

It likes cool, humid conditions and avoids scorching sun; it tolerates fertilizer but not cold. The optimum growth temperature is 13-18°C, and sandy loam rich in humus is most suitable. Depending on temperature, it can complete growth within 110-140 days.

The flowering room temperature for the four-season primrose is 10-15°C. Unlike other primroses, it does not require low temperatures, but appropriate low temperatures can make the plant grow robustly and keep a compact shape, while also increasing the number of flower branches. After entering the flowering period, appropriately increase the concentration of phosphorus and potassium fertilizer, generally using 15-10-30 fertilizer at 200 ppm. After the flowering period, pay attention to pruning withered flower branches to prevent gray mold.

Uses of the Four-Season Primrose

The four-season primrose and various other primroses are important indoor potted flowers, widely cultivated around the world. The four-season primrose is an important potted flower for decorating rooms in winter and spring. It usually blooms from December to April of the following year.

It can also be used as a cut flower. The whole plant is used as medicine to clear heat and detoxify.

Note that the leaf glandular hairs of the four-season primrose contain primin, to which some people are easily allergic. Wiping the hands with alcohol before contact and washing with soapy water after contact can provide protection. It is reported that varieties without primin have already been bred abroad.