Lavatera maritima (l.bicolor) tree mallow

Tree mallow is an evergreen subshrub or semi-evergreen woody perennial which looks like a Rose-of-Sharon shrub when in flower. No wonder, they are from the same family. Flowers of tree mallow are 5-petalled, 6-8 cm across, white with rich magenta violet centres, and appear from midsummer until early to mid autumn. The distinct flower colour contrast also gave birth to another Latin name lavatera bicolor which is accepted as a synonym. Pelargonium-like leaves are shallowly lobed to almost rounded or maple-like palmate. In our climate they are semi-evergreen to deciduous.

The plant is cultivated as a woody perennial – prune it hard in early spring to 10-20 cm above ground. It grows fast and makes 1-1.5m long, upright stems bearing profusion of flowers till the last warm and sunny days of early autumn. The older the plant the bushier it gets. It comes from the Mediterranean which makes it a great choice for a maritime style landscape – use it along with cratostigma, lavandula, rosmarinus, perovskia, caryopteris, hypericum, buddleja, salvia, gaura and other drought loving perennials. It also makes sense to incorporate it into macchia type landscape.

Tree mallow is easy to grow if you choose the right spot and soil. Grow it only in free-draining, light, moderately fertile soil. It does not take flooding or excess watering – leaves will turn yellow and fall off, and roots will be prone to several fungi diseases. It needs full sun and plenty of warmth to bloom profusely. It may not be reliable in exposed and mountainous locations of USDA zone 6. Provide some winter protection in severe winters (mulch, fir branches). Planted well it is hardy and reliable to about -24°C (USDA zone 6).

Last update 16-10-2019