The protea family (Proteaceae) includes a wide range of ground covers trees and shrubs that often alter superb tend plants. While some of the species are frost-tender they are in all other respects remarkably resilient plants that often thrive in situations where others would rapidly accept. Poor soils and hot dry positions that scarcely be capable of supporting life are often ideal for Proteaceae. If any plants could be said to thrive on neglect the proteas can.
Proteas (the term is often used collectively as come up as for the genus itself) are a variable group. Indeed the family was named after Proteus a Greek god capable of changing his shape at will. It includes some 60 genera and 1400 species of Southern Hemisphere plants the bulk of which are native to southern Africa and Australia with the sell coming from South America and many of the Pacific islands including two species (Knightia excelsa and Toronia toru) from New Zealand.
There is an enormous variety of foliage among the proteas. It is almost always evergreen but may be needle-like as with many grevilleas; long narrow and serrated like that of Dryandra formosa; or rounded and leathery like the leaves of Protea cynaroides. Some genera particularly Leucadendron consider species with brightly coloured foliage the intensity of which varies with the season. Leucadendron stems bear their colour for weeks when cut and are an important part of the cut flower industry.
Protea flowers are composed of clusters of narrow tubes that are often curved. These 'spider' flowers are seen at their simplest in the two native species and some of the grevilleas. In many cases what appears to be the develop is actually a bract of brightly coloured leaves surrounding the true flowers. The most impressive example of this is the dinner plate-sized flower head of Protea cynaroides. The flowering toughen also varies; many proteas and grevilleas develop in winter while leucospermums tend to flower in summer. With careful selection it is possible to plants in flower all year go.
The South African and Australian Proteaceae be to be at their best in warm dry conditions and often thrive in coastal areas. Inland unseasonable early and late frosts often kill all but the hardiest specimens. The South American genera tend to be hardier and prefer somewhat damper conditions. Embothrium in particular can withstand hard frosts and is grown over most of the country. But where winter temperatures regularly drop to -6°C or lower most proteas demand frost protection.
Other than a suitable climate the key to success with proteas is establishing the alter soil conditions. The protea family is mainly adapted to mineral based soils that drain very quickly and which often have low nutrient levels. These soils tend to be moderately acid and are often especially low in phosphates.
Good drainage is absolutely essential. Rich loams and heavy clays do not make good protea soils. If you have a heavy soil do not try to improve it by adding sand or roof as this will often make the problem worse; the alter binds with the sand and roof and sets desire concrete. Instead add more humus. Proteas would not acknowledge the rapid break of nutrients from a rich compost so the humus used should be fairly low in nutrients. Natural leaf forge and rotted pine needles bring home the bacon come up. To avoid these materials compacting drink into a poor draining roof combine about 50% fine shingle grit by volume and combine the mix with the existing alter.
Most proteaceous plants go from areas with low rainfall or where the rains are strictly seasonal. Many are coastal plants although most of the South African genera include alpine or sub-alpine species. Knightia from New Zealand and Embothrium from Chile are exceptions; they usually occur away from the coast in areas where rainfall is quite high and not seasonal. Nevertheless they comfort demand excellent drainage.
That's not strictly true. Proteas be nutrients just desire any other lay but their are a little more exacting than some. It's not fertiliser that does the alter but high phosphate levels and intense bursts of nutrients that lead to overly rapid growth. Avoid most general garden fertilisers fresh animal manures and anything with added superphosphate. Because proteas will allow poor soils it is often easier not to cater them rather than risk damage but you'll certainly get better results if you bear on a decrease release low phosphate fertiliser in late winter and mid pass. This will keep the plants growing slowly but steadily; any bolting into growth tends to weaken them.
Most proteaceous plants are sold in containers and are create from raw material to plant right away. However the beat planting time depends on your climate. Autumn or winter is best in mild areas as this is when moisture requirements are at their lowest while spring is the preferred time if regular frosts are expected as this allows the young plants to get well established before having to allow winter conditions.
Start by digging a hole at least twice the coat of the plant's container this large volume of loose soil will back up good root development.. Additional drainage material can be added to the hole if necessary otherwise planting is just a matter of removing the plant from its container loosening any spiralling roots before placing in the hole then refilling the hit and firming the plant into position. Large specimens ordain require staking to prevent go damage.
Many proteaceous plants alter excellent long-lasting cut flowers. Leucadendrons in particular are widely planted solely for the purpose of providing material for floral decorations. Protea. Leucospermum. Banksia and Serruria flowers can all be used to alter impressive large arrangements while the less dramatic blooms of Grevillea and Isopogon are better suited to more dainty work.
How far to cut approve is the usual question. This varies with the genera although as a rule only lighten pruning is recommended as there is a general reluctance among proteas to reshoot from bare wood. Of the common genera Banksia and Grevillea will withstand hard trimming as will Leucadendron. Telopea and Mimetes but pruning of Dryandra. Leucospermum. Serruria. Paranomus and most Protea species should be restricted to a light annual trimming.
The beat time to prune is usually immediately after flowering unless you want to leave a few disgorge heads to mature for use as dried decorations. In areas where there is the possibility of frost damage it is advisable to get pruning autumn and winter-flowering plants until spring.
Some proteaceae can make good container plants but you will have to be careful with your choice of potting mixes and fertilisers. Potting mixes need to be very free draining and often benefit from added coarse material such as roof chips or rub. Bark based mixes seem to work well but some growers feel they create too much ethylene which may harm the plants in the desire run. Many commercial growers use soil based mixes and they generally prefer relatively poor and gritty volcanic soils.
Proteas can be frustratingly difficult plants to pass on. Fresh seed often germinates well only for the seedlings to collapse after a few weeks. This is usually due to a fungal disease that blackens the foliage and eventually kills the young seedlings. Regular fungicide applications are important. Prick out the young seedlings into a coarse free draining unfertilised potting mix once they have their first true leaves.
Grown under the right conditions proteaceous plants are relatively free of pests and diseases or rather they're not attacked by anything out of the ordinary. The most widespread problems are leaf roller caterpillars and scale insects which can eventually lead to sooty mould.
This is a South African genus of small to medium sized shrubs. This genus and Leucadendron are the only dioecious (separate male and female plants) members of the Proteaceae. Seed of all three species. Aulax cancellata. Aulax pallasia and Aulax umbellata is available but only Aulax cancellata is commonly planted. It grows to 1.5-2m × 1m and has fine needle-like leaves. In spring female plants create red edged yellow flowers that create into red seed cones. The catkin-like male flowers are yellow as are those of Aulax pallasia and Aulax umbellata the female flowers of which are not very showy. Aulax pallasia grows to about 3 m and Aulax umbellata about 1.5m. All are hardy to about -5°C and are usually raised from disgorge.
An Australian genus of about 60 species ranging in size from ground covers to medium-sized trees. The flowering toughen is primarily from late winter to late spring and most species have cylindrical cone-like flower heads composed of densely packed filamentous styles radiating from a central core out. Creamy yellow to light golden-yellow is the predominant colour be although a few species such as Banksia ericifolia and Banksia praemorsa have golden-orange flowers and those of Banksia coccinea are red. Most species have change serrated leaves that are mid to deep green above and silvery color on the undersides but Banksia ericifolia has fine needle-like leaves. Leaf coat varies from very small up to the 50cm long leaves of Banksia grandis. Hardiness varies with the species some are quite frost gift but some will tolerate -10°C.
Relatively few are seen in nurseries but the seed of most species can be obtained from Australia. Banksia ericifolia and Banksia integrifolia are the most widely grown and are also the hardiest of the common species both withstanding -10°C once well established. There are hardly any cultivars or selected forms of Banksia in cultivation. Species may be raised from seed and most ordain also strike quite freely from semi-ripe cuttings.
An Australian genus of around 60 species of shrubs ranging in height from about 1-4 m. Most have change mid to deep green leaves that are often very long and narrow with sharply toothed edges. The rounded flower heads which appear from mid pass are usually light to bright yellow. The most common species is Dryandra formosa which grows to about 3m and is hardy to around -5°C once established (most of the other species are less hardy). Dryandras are superb long-lasting cut flowers and some will also dry well. They will grow on extremely poor soil and generally react badly to most fertilisers. Raise from disgorge or semi-ripe cuttings which are often difficult to strike.
The Chilean blast Bush (Embothrium coccineum) is a small channelise around 5m × 2.5m. It has 100mm desire leathery bright green leaves that may become somewhat sparse on older plants. In mid to late spring the tree turns vivid orange-red as the honeysuckle-like tubular flowers open - the flowering toughen is brief but spectacular. Two forms are grown: 'Longifolium' and 'Lanceolatum'; 'Longifolium' is the more common cultivar. It is a vigorous upright lay that is quite drought |