Verbena bonariensis is a tall and elegant plant which produces sprays of fragrant purple flowers on slim delicate stalks. It works well in a number of garden settings, such as cottage and contemporary gardens and will add stature and structure to your border. It has a long flowering season, making it an ideal plant for low-maintenance gardens and herbaceous borders.
It's also beneficial for attracting wildlife, particularly butterflies and has been awarded the RHS Award of Garden Merit (AGM).
|When to sow||March to May|
|Where to sow||Seeds will germinate quicker if they are given a period of cold before planting. Place the seeds with a little moistened compost in a plastic bag and place in the fridge for two weeks|
|Sow indoors finely on the surface of moist compost filled pots or trays and cover the seeds with a very fine sprinkling of compost or vermiculite.|
|Cover the container with dark paper or similar as the seeds need the dark to germinate.|
|Place the container in a dark place in a warm position (temperature of 18-25°C (65-77°F) is ideal).|
|Remove the cover once they begin to germinate to allow air to circulate (otherwise they may suffer from damping off) and reduce the temperature to around 15°C (60°F).|
|What to do Next||When seedlings are large enough to handle, transplant into 7.5cm (3in) pots or trays and grow on in cooler conditions.|
|When all risk of frost has passed, acclimatise indoor raised seedlings to outdoor conditions over 7 to 10 days. Then transplant into final growing position planting them 30cm (12in) apart.|
|Water well until plants are established.|
|Deadhead to encourage further flowering.|
|Flowering period||June to October|
|Companion Planting||Extremely attractive to butterflies.|
|Uses||Herbaceous border and cut flowers.|