Cat greenbrier
Smilax glauca · Smilacaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around cat greenbrier and prepare for winter.
ID card
- Foliage
- Deciduous to semi-evergreen depending on climate
- Flowering
- Spring (April-May), inconspicuous flowers in clusters
- Mature size
- Up to 3-4 m in length in cultivation
- Growth
- Moderate to fast
- Hardiness
- Zones 6-10 (tolerates -10 to -15 °C)
- Origin
- North America (eastern United States)
- Soil type
- Well-drained, neutral to acidic, tolerant
Care
Exposure
Plant Smilax glauca in full sun to part shade for optimal growth. Too much shade will slow its progression. This climbing plant enjoys an airy location but should be protected from drying winds.
Watering
Water regularly during the first summer after planting to establish the root system properly. Once established, the plant is fairly drought-tolerant. During the growing season, keep the soil lightly moist without waterlogging.
Soil and preparation
Enrich the soil with compost or organic matter when planting. Smilax glauca tolerates various soil types but prefers adequate drainage. A mulch layer on the surface helps retain moisture and regulate temperature.
Pruning and training
Prune lightly after flowering to guide growth and maintain the desired shape. Install a trellis or sturdy support at planting time. Remove dead or damaged stems in late winter.
Fertilizer
Apply balanced fertilizer in spring when vegetation resumes. Light feeding is sufficient; excess promotes foliage at the expense of flowers. A slow-release organic fertilizer is suitable.
Pests and diseases
Smilax glauca is generally robust. Watch for powdery mildew in humid conditions without air circulation. Good ventilation and removal of affected leaves prevent most problems. Spider mites may appear during dry summers.
Did you know?
Smilax glauca is called 'greenbriar' or 'sarsaparilla' depending on the region. Its blue-gray berries, which persist long on the plant, provide an important food source for migratory birds in autumn and winter, making it a valuable ally for ecological gardens.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
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Tips generated and checked by Viridia — adapt them to your local climate.