What are the six ornamental flowers that can withstand temperatures of minus ten degrees Celsius?

In the cold winter, many flowers enter a dormant period, but some ornamental flowers can still grow luxuriantly at low temperatures, adding vitality to the winter garden. The following introduces six ornamental flowers that can endure low temperatures of more than minus 10 degrees, including panicle hydrangea, weigela, deutzia, spiraea thunbergii, iris, and spiraea.

Panicle hydrangea

Panicle hydrangea is a flower with extremely high ornamental value, with many varieties. It is heat-tolerant, sun-tolerant, and extremely cold-hardy, able to endure low temperatures of more than minus 20 degrees or even more than minus 30 degrees. Its flowers are conical in shape, with rich colors including white, yellow-green, pink, and red. In northern regions, panicle hydrangea can be grown in the open ground and is very suitable for planting in yards. However, when planting, care must be taken to ensure good drainage and avoid water accumulation. In addition, panicle hydrangea needs sufficient light. It has a brief dormant period each winter, and after spring warms up, the branches can be pruned to promote new branch growth and avoid overly long branches causing the flowers to droop.

Weigela

Weigela is also called "five-color crabapple" and is an ornamental shrub suitable for low-maintenance growing. It can grow well in northeastern and northwestern China and has extremely strong cold tolerance and moderate shade tolerance. With sufficient light, weigela blooms even better. Its flowers are small trumpet-shaped, with bright and colorful petals, and it generally begins blooming each summer. Weigela is very tolerant of pruning and is suitable as a hedge plant or landscape plant. When cultivating, the soil must be fertile, loose, and well-drained. It is very drought-tolerant but afraid of excessive water.

Deutzia

Deutzia is a perennial deciduous shrub with many varieties, diverse forms, and strong ornamental value. Its plants are small and suitable for pot cultivation or growing outdoors in yards. Deutzia blooms from 3-5 each year after spring warms up, with an extremely large number of flowers that look elegant and romantic. During care, regular pruning is needed to maintain a good plant shape. Deutzia has strong cold tolerance and can endure low temperatures no lower than minus 25 degrees, and can overwinter outdoors in northern regions such as Beijing. However, after leaf fall in winter or before budding in early spring, a light pruning is needed to cut off dead branches, diseased branches, and overly dense branches.

Spiraea thunbergii

Spiraea thunbergii, also called snow willow, is a very easy-to-grow deciduous shrub. It has strong adaptability, tolerates poor soil, high temperatures, and sun exposure, and has good cold tolerance, able to endure low temperatures of minus 25 degrees. Spiraea thunbergii has a relatively long flowering period, generally blooming each year in 3-41-2 years is sufficient. In addition, overly dense branches and dead branches need to be pruned to reduce pest sources.

Iris

Iris has many varieties, each with different ornamental qualities, bright colors, and graceful forms. It can grow in cold regions and can even grow in Russia. Iris has strong cold tolerance and prefers a warm and cool climate, growing robustly within a temperature range of 15-28 degrees. Iris planted in the ground can withstand low temperatures of minus 9 degrees in winter, so it can overwinter in the ground in many regions. During care, good drainage must be maintained to avoid the soil often holding water. Iris needs relatively more light, which is very beneficial to its growth. During the growing season, liquid fertilizer can be applied once every half month, and fertilizing should stop after flowering.

Spiraea

Spiraea is an ornamental flower suitable for planting in the north, with extremely strong cold tolerance, able to survive low temperatures of more than minus 10 degrees in winter. It has many varieties with different ornamental qualities; some varieties have attractive leaves, while others bloom abundantly. Spiraea is suitable for growing in large flower pots as a shrub flower and can also be planted in yards. It has strong adaptability to the environment and can grow well in partial shade. In places with more light, the flowering period is longer and the ornamental value is better. When planting, a thick layer of decomposed manure can be buried at the bottom of the soil, and then soil added afterward to avoid the roots directly contacting the fertilizer. During later care, it does not require overly frequent attention; with sufficient light, it can grow especially well.

These ornamental flowers not only have strong cold tolerance but also high ornamental value, and can add a bright touch of color to the winter garden. During care, simply paying attention to basic drainage, light, and fertilizing requirements will let them grow vigorously.