Horticulture/Verbena

Verbena (Verbena or Vervain) is a genus of about 250 species of annual and perennial herbaceous plants in the Verbenaceae. The majority of the species are native to the New World from Canada south to southern Chile, but a few also native in the Old World, mainly in Europe (V. officinalis, V. supina).

Description
The leaves are usually opposite, simple, and in many species hairy, often densely so. The flowers are small, white, pink, purple or blue, with five petals, and borne in dense cymes or panicles.

The stems are square in cross section. Roots are fibrous.

Uses
Grown for the showy flowers and generally good foliage, but some species are used as medicinal and culinary herbs.

Propagation
Propagated by seed, division, or summer cuttings.

Pests and diseases
Bacterial ../Wilts/ ../Powdery Mildew/ ../Leaf Spots/ ../Flower Blights/ ../Stem Rots/ ../Rusts/
 * Pseudomonas solacearum
 * Erisiphe chichoracearum
 * Septoria
 * Botrytis cinerea
 * Macrophomina phaseoli
 * Pellicularia filamentosa
 * Phymatotrichum omnivorum
 * Thielaviopsis basicola

../Nematodes/ ../Aphids/ ../Whiteflies/ ../Scales/ ../Bugs/ ../Thrips/ ../Beetles/ ../Maggots/ ../Caterpillars/ ../Mites/
 * ../Aphelenchoides olesistus/
 * ../Meliodgyne hapla/
 * Foxglove Aphid: ../Acyrthosiphon solani/
 * Melon Aphid: ../Aphis gossypii/
 * Green Peach Aphid: ../Myzus persicae/
 * Greenhouse Whitefly: ../Trialeurodes vaporariorum/
 * Silverleaf Whitefly: ../Bemisia argentifolii/
 * Cottony Cushion Scale: ../Icerya purchasi/
 * Tarnished Plant Bug: ../Lygus lineolaris/
 * Greenhouse Orthezia: ../Orthezia insignis/
 * Western Flower Thrips: ../Frankliniella occidentalis/
 * Flower Thrips: ../Frankliniella thricti/
 * Greenhouse Thrips: ../Heliothrips haemorrhoidalis/
 * Clematis Blister Beetle: ../Epicauta cinerea/
 * Vervain Leaf Miner: ../Agromyza artemesiae/
 * Oblique Banded Leafroller: ../Choristoneura rosaceana/
 * Yellow Woolybear Caterpillar: ../Diacrisia virginica/
 * Vervain Bud Moth: ../Endothenia hebesana/
 * Morning Glory Leaf Cutter: ../Loxostege obliteralis/
 * Garden Webworm: ../Loxostege similalis/
 * Tobacco Budworm: ../Heliothis virescens/
 * Broad Mite: ../Rhizoglyphus echinopus/
 * Cyclamen Mite: ../Steneotarsonemus pallidus/
 * Two-spotted Spider Mite: ../Tetranychus urticae/