Taxonomy of Winter Jasmine Plants:
classifies winter jasmine plants as Jasminum nudiflorum
. For research purposes, note that Jasminum polyanthum
also sometimes bears the common name, "winter jasmine" -- just another example of why we use scientific plant names
to avoid confusion.
USDA Plant Hardiness Zones for Winter Jasmine Plants:
Winter jasmine plants are recommended for planting zones
6-10. By providing a warmer microclimate
(south side of my house), I have been able to grow mine in zone 5. Initially, I also enclosed mine in an ad hoc shelter for the winter, fearing it wouldn't be hardy enough in my region. But one winter I decided to experiment, leaving my specimen uncovered. It survived just fine, so, since then, all I've done to overwinter the plant is to mulch it with a few inches of straw.
Winter jasmine plants reach 4' in height with a width of 7' when unsupported. Supported, they can reach 15' in height. The 1"-wide yellow blooms appear in late winter/early spring prior to the leaves but, unlike most jasmines, are not fragrant. Stems stay green in winter.
Sun and Soil Requirements for Winter Jasmine Plants:
Grow in full sun to partial sun, in well-drained soils.
Uses in Landscape Design:
Prune winter jasmine plants in spring, after they have bloomed.
Caveat in Growing Winter Jasmine Plants:
Unsupported winter jasmine plants grow as viny shrubs and can be somewhat invasive, since the stems put out roots wherever they touch the soil. Conscientious pruning is required to keep such winter jasmine plants from spreading where they are not welcome. This requirement is less pertinent to winter jasmine plants trained as vines. By tying their stems to arbors or trellises, you minimize ground-contact and, consequently, opportunities for rooting.
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