Provide quick-draining soil, water only in the morning and allow plenty of space between plants to prevent this problem. Lavandula angustifolia, also called True Lavender or Common Lavender has long been cultivated for its high quality lavender oil. Grown for its silvery aromatic leaves, it is used extensively for essential oils or potpourris. If you are drying flowers you’ve had arranged in vases of water make sure to cut off any brown parts in the stems. Name – Lavandula stoechas (GB) Name – Lavandula dentata (USA) Family – Lamiaceae. Plants typically reach between 1 and 3 feet in height. 2nd Step: Tie the stems together with twine or a rubber band at the base of the stems. Soil – ordinary, well drained Foliage – evergreen Flowering – June to August Cut off the stems of lavender along with the flowers, in 6 inch (15 centimeter) segments or longer. One of the problems with growing lavender in shade is the risk of root rot. Also called French Lavender or Butterfly Lavender, this type of lavender is native to the Mediterranean and Northern Africa. Flowering typically occurs in June or July and tends to last 3-4 weeks. Add mulch (rock or pea gravel work particularly well) to keep weeds to a minimum. Cultivars of this species tend to be compact in habit and have grayish green narrow leaves and relatively short compact flower spikes. Keep the mulch away from the crown of the lavender plant, however, to prevent excess moisture and root rot. Type – herb sub-shrub Height – 24 to 40 inches (60 to 100 cm) Exposure – full sun. While some plants can go without pruning, lavender likely will refuse to flower next summer if you don't prune it (and, let's be honest, it's all about the fragrant flowers with lavender). The very distinctive flowers, however, steal the show with their "ears" sprouting from each flower … 3rd Step: Hang the bunch of lavender flowers upside down in a dark place away from the sunlight to protect the color. Lavandula (common name lavender) is a genus of 47 known species of flowering plants in the mint family, Lamiaceae.It is native to the Old World and is found in Cape Verde and the Canary Islands, and from Europe across to northern and eastern Africa, the Mediterranean, southwest Asia to southeast India.. Plant lavender 2 to 3 feet apart. The leaves and new stems can be used to infuse oil as well as the flowers, although the woody, thick stems near the base should be avoided. French lavender is a nice alternative to common lavender thanks to its very original flowers.. Key facts for French Lavender. Without lots of sun, soil has trouble drying and this disease can affect the plant. Cut sprigs of fresh lavender or purchase them dried.