A Detailed Guide to Spiraea Seed Varieties and Propagation Methods

Spiraea belongs to the rose family and the genus Spiraea. It is an excellent flowering ornamental shrub, with small, lovely flowers and an attractive plant form, giving it high ornamental value. In addition, spiraea varieties and flower colors are extremely rich, with blooming periods ranging from early spring to summer and autumn. It is currently widely used and cultivated in landscaping. So what varieties of spiraea seeds are there? What are the propagation methods? Let's find out together.

What varieties of spiraea seeds are there?

1. Japanese spiraea: native to China, leaves elliptical-lanceolate to broadly lanceolate, flowers red.

2. North China spiraea: distributed in Henan, Hebei, Shanxi, Shaanxi, Gansu, Shandong and other places in China.

3. Willowleaf spiraea: widely distributed, cultivated throughout North China.

4. Chinese spiraea: distributed in Inner Mongolia, Hebei, Henan, Shaanxi, Hubei, Hunan, Anhui and other places.

5. Bridalwreath spiraea: native to East China, cultivated in Shaanxi, Liaoning and other provinces.

6. Goldflame spiraea: native to the United States, introduced to the Beijing Botanical Garden in April 1990 from Bailey Nurseries in Minnesota, USA.

7. Threelobe spiraea: grows on rocky sunny slopes or in shrub thickets, at an altitude of 450-2400 m. Also distributed in Siberia, Russia. Can be cultivated for ornamental purposes.

What are the propagation methods?

1. Seed propagation

Usually sown in spring from March to April, drilled or broadcast on raised beds; for drilling, the row spacing is 15 cm, the sowing width is 5-6 cm, the furrow depth is about 1.0 cm, and the soil covering should be thin, just enough not to expose the seeds. Strengthen management during the seedling stage, and weed and thin out seedlings in time. When the seedlings are 3-4 cm tall, apply a quick-acting chemical fertilizer (ammonium sulfate) at 1 kg per mu.

2. Division propagation

Division propagation is simple and easy, but the quantity is relatively small. Prepare for division in the previous year, start applying more fertilizer in early spring to promote tillering, hill up soil in summer along with weeding, and carry out division in the spring of the second year. Generally, 3-4 year old plants are used as mother plants for division.

3. Cutting propagation

Carried out in June, select semi-lignified branches, keep 2-3 leaves at the upper end, insert 5-6 cm into a sand bed, water thoroughly, build a shade frame, and keep moist. Roots can form in about 1 month. Transplant and cultivate in autumn or the spring of the second year.

Note: Different varieties of spiraea have different propagation methods, and the specifics still depend on the planting environment and cultivation method.

Overall, the classification of spiraea varieties is very broad, and most have the advantages of being robust, cold-resistant, drought-tolerant, and easy to propagate, with bright and beautiful flower colors, making them suitable for cultivation and ornamental viewing. I wonder which kind of spiraea everyone likes? Feel free to leave a comment and discuss.

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