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Cultivating grevillea, all the info


How to grow Grevillea: characteristics of the plant, flowering and cultivation. Photos and info about Grevillea rosmarinifolia, Grevillea juniperina, Grevillea robusta and grevillea lanigera.

That ofGrevilleait is a genus of plants from far away: they are native to Australia, New Guinea and Caledonia, however, many species adapt well to our Mediterranean climate. The genreGrevilleaincludes about 360 species, all native to the rainforest.

For the beautifulflowersthat bloom inAutumn, theGrevilleahas been nicknamedspider flower. It is also known by the name of "silky oak".

Flowers and flowering

Who is on the hunt for autumn flowering plants can rediscover in thegrevilleaan excellent ally but beware! Not all species are autumn flowering, for example, theGravillea Juniperinait blooms from late spring to mid-summer.

Presents flowers from the long chalice that develop into colored curls from which small flexed stomata and a single pistil emerge. THEflowersthey are devoid of petals but rich in ornamental tubes.

There are several species ofGrevillea,some can also be grown in the gardens of the seaside houses as they can withstand the sea salt.

To enrich our garden in autumn, we think the hybrid and selected varieties such asGrevillea Bronze Rambler and the Grevillea Johnsonii, both sun-loving and wind-resistant, the only precaution for their cultivation lies in giving them protection during the coldest winters. In fact, some species ofGrevilleathey can be counted among the cold-resistant flowering plants: they can survive even at temperatures close to -7 ° C.

Which Grevillea to grow?

Who wants cultivate grevillea he must know that he can choose from many species.

Among the easiest species tocultivateand easier to find on the market and that adapt more easily to our climate, there is Grevillea rosmarinifolia, the Grevillea juniperina and the Grevillea robusta. Also of great interestGrevillea lanigera.

Grevillea rosmarinifolia,maximum height 2 meters

The shrub grows up to two meters high and has leaves that resemble - just as the name suggests - rosemary. Its flowers are gathered in clusters and can be bright pink or red. It propagates by semi-woody cutting. The last photo of this page shows thefloweringand the leaves of thegrevillea rosmarinifolia.

Thereflowering is winter. The flowers begin to bloom in late autumn and early winter, and flowering continues until spring.

This plant prefers full sun, can tolerate cold and drought.

Grevillea juniperina, maximum height 2 meters

Also in this case, the shrub grows up to 2 meters in height, the difference lies in the shapes: the Grevillea juniperina maintains a much more compact structure. The leaves are grouped and the flowers can be of different colors, from yellow to red. The ideal propagation is by semi-woody cutting.

Grevillea robusta, grows more than 10 meters

Let's talk about a tree large in size that can easily reach and exceed 10 meters in height, in its natural habitat it grows rapidly until it reaches a height of between 18 and 35 meters. The leaves are similar to ferns and are approximately 30 cm long.

The flowers collected in racemes are orange in color and are carried on short terminal branches. When it comes togrevillea, generally, the propagation by semi-woody cutting is the most advantageous, the seeds, even if stripped, do not germinate easily except for the Grevillea robusta which with sowing can give exciting results.

The photo above shows a grevillea robusta tree. This tree is demanding: it takes a lot of space and has rapid growth. Theregrevillea robustapresents spring flowering.

Grevillea lanigera, maximum height 1.50 m

This plant with typical shrubby habit, reaches a maximum height of 150 cm. Presentspink flowers but there is no shortage of varieties awhite flowersisreds. This plant has a beautiful feature: this shrub is remontant and, under ideal conditions, iflowersthey are always present on the plant. Therefloweringintensifies towards the end ofAutumn to touch the apex inwinter.

Its name "lanigera" recalls the leaves and the "hairy" twigs that vaguely resemble wool. In the photo below, the species is showngrevillea lanigera in the white-flowered (Lutea) and pink-flowered varieties.

Cultivating the Grevillea

There cultivation of gravilleait is not difficult but to ask for some care.

Thegrevilleethey prefer moderately fertile soils with a good ability to drain water. Soils with a neutral or slightly acid pH are particularly suitable. During the vegetative period, it is necessary to irrigate thegrevilleeon a daily basis while in the rainy seasons or in the middle of winter, irrigation must be poor or completely absent.

It won't be necessaryprune the grevillae,you just need to clean it by removing dry branches and those crossed in order to obtain a plant with a more orderly structure. Thepruning, thus described, will be carried out at the end of flowering, in late autumn.

Grevillea, where to buy it

This plant can be found at the best-supplied nurseries and agricultural consortia or by taking advantage of online sales. On Amazon, for example, there are plants supplied in pots with a diameter of 7 - 10 cm or seeds. For all information on the species and varieties on Amazon, please visit "This Page“.


Video: A look at one of Australias rarest plants: Caleys Grevillea (October 2021).