Glandularia Quartz Series (Vervain Quartz Series)

Botanical name

Glandularia Quartz Series

Other names

Vervain Quartz Series, Verbena Quartz Series

Genus

Glandularia Glandularia

Variety or Cultivar

Quartz Series _ Quartz Series are vigorous, compact, mound-forming to trailing, tender, semi-evergreen perennials, often grown as annuals, with ovate to oblong, toothed, wrinkled, dark green leaves and dense clusters of small flowers in shades of scarlet, blue, lilac, lavender, white or burgundy.

Foliage

Deciduous

Fragrance

Flowers may be fragrant.

Habit

Compact, Spreading, Trailing

---

Colour

Flower

Blue, Scarlet, Maroon, White, Lilac, Lavender in Summer

Foliage

Dark-green in Summer; Dark-green in Autumn

---

How to care

Watch out for

Specific pests

Aphids , Leafhoppers , Slugs

Specific diseases

Powdery mildew

General care

Pruning

Cut back after flowering. If grown as an annual, remove at the end of the growing season.

Propagation

Sow seed at 18-21C in early spring 8-10 weeks before the last frost date. Take stem-tip cuttings in late summer.

Propagation methods

Seed, Stem tip cuttings

---

Monthly care advice

---

Where to grow

Glandularia Quartz Series (Vervain Quartz Series) will reach a height of 0.3m and a spread of 0.4m after 1-2 years.

Suggested uses

Beds and borders, City, Containers, Cottage/Informal, Garden edging, Gravel, Hanging baskets

Cultivation

Grow in moist, well-drained, moderately fertile soil in full sun. In cold areas, protect with a dry winter mulch. In containers, grow in loam-based compost with added sharp sand. In growth, water freely & feed monthly; sparingly in winter.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Indoor heated (H1), Tender in frost (H3)

USDA zones

Zone 11, Zone 10, Zone 9

Defra's Risk register #1

Plant name

Glandularia Quartz Series (Vervain Quartz Series)

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

5

General biosecurity comments

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Glandularia Quartz Series (Vervain Quartz Series)

Common pest name

Scientific pest name

Phytophthora tentaculata Kröber & Marwitz - All Hosts

Type

Oomycete

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

5

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Polyphagous pathogen present in parts of Europe and beyond.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/