P II

Hibbertia scandens

P was for pea last Sunday. Although the spelling has not changed since then, this is a different topic now, so is not actually a sequel. P just happens to also be for the floral fragrance of Hibbertia scandens, which, to some, resembles that of what tomcats do to designate their territory. Its several common names are no more appealing. It is known as golden guinea vine, climbing guinea flower and twining guinea flower. Rather than possibly offending others of Italian descent, I refer to it simply as snake vine. Contrary to its several other common names, it is not actually from the Guinea Region of Western Africa, but is instead from Eastern Australia and New Guinea. Incidentally, New Guinea is no more affiliated with Western Africa than it is with descendents of Italian Immigrants in America, or plump rodents who identify as pigs of the Andes Mountains on the West Coast of South America. I got a few cuttings of snake vine at the end of last September. One cutting is growing quite nicely. Another took time to bloom with this single flower that looks like Carl Junior did not quite beat the train. Its floral fragrance is almost disappointingly unobjectionable. I suspect that more are necessary to be perceptibly fragrant. From my limited experience with the species, I remember than only a profusion of bloom produced merely a slightly objectionable fragrance. Like so much of what I grow here, I have no idea of what to do with these new snake vines. Fortunately, they are more docile than the white perennial pea that I mentioned last Sunday, or the cup of gold vine that I mentioned earlier. Eventually, I should be able to accommodate some within at least one of the many refined landscapes at work. If so, I will not put enough of it within the same situation to generate annoyingly objectionable floral fragrance. Nor should any individual specimen be allowed to grow large enough to do so. I would be more tolerant of a slight bit of such fragrance within my home garden only because I happen to be fond of this species now that I have reacquainted with it.

‘Little John’ Bottlebrush

‘Little John’ bottlebrush enjoys warm weather.

Old fashioned lemon bottlebrush would be so practical, if only it did not get so bulky. It is impressively resilient. Although appreciative of occasional watering, it needs none once established. Phases of red bloom continue through warm spring and summer weather. A few sporadic blooms may continue throughout winter. Hummingbirds are very fond of it.

‘Little John’ bottlebrush, Callistemon viminalis ‘Little John’, is all that and less. It remains much more proportionate to compact home gardens. Growth is relatively slow and tame. Mature specimens may grow no bigger than three feet tall and five feet wide. They prefer to assume naturally mounding form without shearing. Any pruning should be quite minor.

More than compact form distinguishes ‘Little John’ bottlebrush from lemon bottlebrush. Its evergreen leaves are relatively small and slightly grayish. Their foliar texture is relatively tidy. Its lemony foliar aroma is relatively subdued and only evident if foliage is disturbed. The fuzzily staminate floral trusses are relatively small with relatively mellowed red color.

Grevillea ‘Canberra’

Most Grevillea are from chaparral climates.

So many similar cultivars of low shrubby grevilleas come and go that it is hard to know what is what. All prefer sunny exposure and good drainage. They really do not like too much watering or fertilizer, particularly fertilizer with phosphorus. Pruning after bloom promotes more bloom, which keeps hummingbirds happy. Some people who are allergic to grevilleas can get a rash from handling the foliage.

Grevillea ‘Canberra’ was probably the most popular grevillea in the early 1990s, but can be hard to find now that other similar grevilleas are more common. It is a mid-sized shrub with dark green foliage that resembles pine needles on arching branches about six feet tall and broad. Small clusters of rosy red flowers bloom along the branches in winter and spring.

Weeping Bottlebrush

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Weeping bottlebrush blooms whenever it likes.

It is no wonder that it takes many years to get to fifteen feet tall, and may never get more than twenty feet tall. Weeping bottlebrush, Callistemon viminalis, may grow less than a foot a year, but seems to hang downward two feet. Because the stems are sculptural, and the bark has an appealingly rough texture, most weeping bottlebrush trees are grown with multiple trunks. The brick red bottlebrush flowers that bloom sporadically at any time of the year are more abundant early in summer. Established plants bloom more colorfully with a bit of water, but can probably survive quite a while without it. The evergreen leaves are narrow and mostly less than three inches long. Weeping bottlebrush needs good sun exposure.

Knife-Leaf Wattle

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This wattle sports texture with color.

Even without the bright yellow staminate flowers (fuzzy with prominent stamens) that bloom in late summer or autumn, the grayish foliage of knife-leaf wattle, Acacia cultriformis, is still striking. It contrasts nicely with dark green foliage of pines, redwood and ivy. What seems to be small triangular leaves are actually ‘phyllodes’, which are modified petioles (leaf stalks) of vestigial leaves. They are about half an inch to an inch long, and neatly arranged on stiff stems.

Mature trees do not get much more than ten feet tall, and grow slowly enough to be kept even shorter. They can tolerate a bit of shade from larger trees. However, they bloom more profusely with better exposure. If the pollen is not a problem, the flowers are nice for cutting. So is the foliage, which is complimentary to many other cut flowers. Like almost all acacias, knife-leaf acacia does not require much water once established.

‘Little John’ Bottlebrush

P81214Where it has space to grow, classic lemon bottlebrush that was so popular in the 1960’s is still a practical and resilient large shrub, and is happy to bloom with bright scarlet flowers as long as the weather is warm. It is resistant to most diseases and pests, and once established, survives on annual rainfall. Its main problem is that it simply gets too big for many situations.

Dwarf bottlebrush, Callistemon ‘Little John’, is more often a better fit, although it has a very different personality. It is short and dense, and spreads more laterally than upright. Mature plants are only about three or four feet tall, and maybe twice as wide. The smaller leaves are somewhat grayish. The distinctive bottlebrush flowers are a slightly darker shade of purplish red.

Even though established plants do not need much water at all, regular (but not necessarily generous) watering promotes bloom and growth. However, excessive watering can be lethal. Full sun exposure is best. A bit of light shade should be no problem. Dwarf bottlebrush makes a nice low informal (unshorn) hedge. Flowers attract bees and hummingbirds.

Geraldton Waxflower

70104What is it about Australian plants that makes them bloom in winter? Perhaps they think they are still in Australia where it is summer. Whatever the deal is, Geraldton waxflower, Chamaelaucium uncinatum, provides a scattering of small white, pale pink or lavender pink flowers from now until spring. It is no mistake that their bloom resembles that of New Zealand tea tree. They are related.

Geraldton waxflower is pretty serious about drought tolerance. It can rot and fall over it stays too damp for too long. It likes a warm exposure and well drained soil. It is normal for the tiny evergreen leaves to be somewhat sparse. Unfortunately, it is also normal for healthy specimens in ideal situations to die out within ten years or so. Mature plants can get a bit more than six feet tall and wide.

Australian Fuchsia

61228Pictures are probably prettier than the real thing. Australian fuchsia, Correa pulchella, really does bloom with pendulous soft pink flowers through winter when not much else is blooming. However, the flowers are quite small, and the color is rather hazy. The real appeal of Australian fuchsia is that it is so undemanding, and once established, only needs watering a few times through summer.

Mature plants get a bit higher than two feet, and maybe twice as wide, with a low mounding form. The small evergreen leaves have a nice density without any pruning. Obtrusive plants do not mind getting pruned back or even shorn for confinement, but are deprived or their naturally appealing form and texture if pruned too frequently. Good exposure for both sunlight and warmth is important.

New Zealand Tea Tree

61221With such an odd variety of flowers blooming out of season, it should be no surprise that New Zealand tea tree, Leptospermum scoparium, decided to join the party. It starts blooming in phases in spring, and continues into autumn, so is not too terribly out of season. Besides, some varieties are known for spontaneous bloom phases at any time of year. Bloom can be pink, white or red.

The finely textured and aromatic evergreen foliage is slightly prickly to touch. Individual leaves are tiny and rather narrow, with pointed tips. Flowers are also tiny, but compensate with profusion. A few varieties have darker, almost bronzed foliage. A few varieties have fluffier double flowers (although the flowers are no wider than single flowers). The weight of bloom can cause limbs to sag.

Most garden varieties can reach the eaves. Larger varieties can eventually get to upstairs eaves. With minimal pruning, New Zealand tea tree is a colorful big shrub, with blooming stems from top to bottom. Alternatively, it can be an excellent small tree, with lower stems pruned away to expose the finely furrowed bark of the main trunks. It wants full sun, but not much else once established.

‘Peaches and Cream’ Grevillea

71011No one knows for certain who the parents were, so the hybrid Grevillea ‘Peaches and Cream’ lacks a species designation. (If it is important, the parent are most likely Grevillea banksii and Grevillea bipinnatifida.) It is an evergreen shrub that gets about four feet high and wide, with intricately lobed light green foliage. Individual leaves are about four inches long and two inches wide.

Four inch long floral trusses of tiny flowers can bloom at any time, attracting hummingbirds. Flowers bloom greenish yellow and then fade through a range of yellow, peachy orange and pink, from the bottom of the truss to the top. Warm and sunny exposure promotes bloom. Established plants do not need much water. Like other grevilleas, ‘Peaches and Cream’ grevillea can cause contact dermatitis. (It is best to know if one is allergic to it before planting it.)