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Trees Should Fit Their Gardens

Some trees eventually grow very large.

A tree is a woody perennial plant with a single tall trunk and branches. However, several tree types can not conform with this overly simplistic definition. Palm trees and tree ferns are neither woody nor branched. Although branching, arboriform yuccas and dracaenas are no woodier than palms. Banana trees develop a few unbranched herbaceous trunks.

Actually, several types of trees do not conform with their own definition. Many Japanese maples, crape myrtles and olive trees develop multiple trunks. Many citrus are not as tall as big shrubbery. Papayas are merely large perennials that survive for only a few years. Banyans support their canopies with multiple aerial roots instead of conventional trunks.

Generally, though, trees are the most significant living components within their gardens. Not much else within home gardens is as big or as permanent as its trees are. Some old oaks inhabited their gardens centuries before their gardens. Some old redwoods contain more lumber than their associated homes. Many trees influence adjacent home gardens.

This is why proper selection is so important. Trees must be appropriate to their particular applications. They should remain proportionate to their particular situations, even if they live for centuries. They should not generate more mess than those living with them want to contend with. Also, they should not require more maintenance than they will likely get.

Shade trees near houses should be deciduous to allow sunshine through during winter. Evergreens at a distance can obscure unwanted scenery throughout the year. Evergreen vegetation is generally a bit messier than deciduous vegetation, though. It sheds through the year instead of only in autumn. Utility cables and easements limit placement of trees.

Many municipalities have adopted strict tree preservation ordinances. Such ordinances protect heritage trees or trees that exceed a particular size. They often make it difficult or impossible to remove unwanted and problematic trees. Preemptive selection of the most appropriate tree varieties helps avoid such situations. Prevention is better than the cure.

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Colorful Foliage Regardless Of Bloom

Dusty miller has silvery gray foliage.

Home gardens display more floral color now than at any other time of year. So much is in bloom. So much more is generating fresh new foliage. Most, but not all, of such foliage is green. Some is splendidly colorful. Although foliar color is generally not as vivid as floral color, it lasts longer. Some evergreen colorful foliage retains its color throughout the year.

Colorful foliage is not the same as foliage that turns color for autumn, although it can be. Most is evergreen. Generally, it is most colorful as it grows fresh through warming spring weather. Some fades somewhat through summer. Some deciduous colorful foliage also turns color for autumn. Also, some foliarly colorful species provide fruit or showy flowers.

A few cultivars of European elderberry with bronze or variegated foliage produce berries. Variegated pink lemon is, as its name implies, both variegated and fruitful. Smoke tree is fruitless, but is colorful twice. It is either dark bronze or bright chartreuse yellow for spring and summer. Then, it turns color for autumn. It lacks color only while bare through winter.

Colorful foliage can be bronze, silver, gold or variegated. Bronze is the most varied since it can be bronzy shades of purple, red, orange or brown. Purple leaf plum is probably the most familiar tree with bronzy purple foliage. A few cultivars of New Zealand flax produce foliage that is either bronze or variegated. Their variegations can be bronze, gold or pink.

Silver foliage occurs mostly among plants that are endemic to high elevations or deserts. Such color reflects some of the harshly intense sunlight to protect the foliage from scald. Both Colorado blue spruce and Arizona cypress are naturally endemic to high elevation. Blue agave is endemic to deserts. Silvery foliage can be gray, pale blue or almost white.

Colorful foliage is not otherwise an advantage, though. Gold and variegated foliage has less chlorophyll than green foliage, so grows slower. New Zealand flax, smoke tree and elderberry can be either gold or bronze. Gold cultivars of each are innately less vigorous than the bronze. Coleus and caladium are among the most variegated of colorful foliage.

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Succulents Within Average Home Gardens

Succulents contribute form, color and texture.

All cacti are succulents. So are all agaves. Technically, yuccas are too, even though they are no more succulent than palm trees. Perhaps that is why succulents have a reputation as xerophytic plants. In other words, succulents are supposedly drought tolerant. Most of these examples are. However, there are more succulents than cacti, agaves and yuccas.

Cacti, agaves and yuccas, as well as some of the euphorbias, are the spiny succulents. It is how they defend themselves from hungry herbivores within their natural ecosystems. Although they have a reputation as xerophytic, some uncommon sorts are quite tropical. Some can grow quite big, and because of their spines, can become difficult to work with.

Fortunately, many other succulents are neither as spiny nor as potentially cumbersome. However, contrary to popular conception, many of them are also not as xerophytic. Many that can survive with minimal irrigation perform better with occasional irrigation. Several require regular irrigation. Succulents should not be synonymous with drought tolerance.

Aeoniums, or houseleeks, can easily survive with minimal irrigation for a significant time. However, their otherwise luxuriant foliar rosettes partially defoliate to conserve moisture. With regular irrigation, they are lush, sculptural and colorful. Some are rich bronze while others exhibit delightful variegation. Aeoniums are among the more popular succulents.

Almost all small scale succulents, and a few larger ones, are easy to grow from cuttings. Clumping sorts, such as echeveria, are about as easy to propagate by division. Cuttings or pups of most sorts can be plugged directly where new plants are desirable. They only require frequent watering as they disperse roots. Then, they need only regular irrigation.

Also, almost all succulents can grow in pots. Cacti merely require very efficient drainage. Some big and spiny succulents, though, are not as portable as other potted plants. Large cacti can break if jarred. Agaves can get too heavy and broad to move safely. Otherwise, confinement of roots within pots is no problem. Some potted plants can be houseplants.

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Palm Trees Within Home Gardens

Palm trees make a bold statement.

Trees conform to an overly vague definition. Most simply, they are substantial and woody perennial plants with tall trunks and branches. Yet, several Japanese maple trees are no more substantial than big shrubbery. Tree ferns and banana trees are neither woody nor branched. Arboriform yucca trees and palm trees are technically herbaceous, not woody.

Doum palms, which are the only palms that develop branches, are extremely rare locally. Any other palm which develops a branch is an extremely rare aberration. Therefore, with very few and extremely rare exceptions, palm trees develop no branches. A few, such as the Mediterranean fan palm, develop a few trunks though. All trunks develop at the base.

Palm trees are either fan palms or feather palms. Fan palms have round palmate leaves on sturdy petioles. Feather palms have elongated pinnately compound leaves on sturdy rachises. Most fan palms have nasty teeth on their petioles. Several feather palms have dangerously sharp spines on the bases of their rachises. All palms trees are evergreen.

Once palm trunks begin to grow upward, they do not widen. Nor do their foliar canopies. They grow only vertically. Those that encroach into high voltage cables require removal. Unfortunately, most palm trees grow high enough to necessitate the services of arborists. Although trunks do not expand, some large palms develop widely distended basal roots.

Mexican fan palms are the most prominent of palm trees locally because they are so tall. California fan palms, or desert fan palms, are shorter and stouter but much less common. Canary Island date palms are big and bold feather palms with wide and dense canopies. Common date palms, which only became common recently, are not as broad and dense.

Queen palms develop billowy and feathery canopies on tall and elegant trunks. They are among the most popular of palm trees nowadays. Windmill palms are relatively small fan palms with very shaggy trunks, but can grow tall. Mediterranean fan palms stay lower but with a few curving trunks. These are merely a few examples of many different palm trees. A few more are available. Bismarck palm and hesper palm are becoming more popular.

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Pruning At The Proper Time

Timely pruning can allow for bloom.

Motorized hedge shears are the most overused home garden power tools. They are very useful for hedges and similarly shorn shrubbery. The problem is that they too often shear vegetation that needs different types of pruning. Also, they often perform proper shearing at improper times. The efficiency is a distraction from seasonality and proper horticulture.

Dormant pruning happens during winter while subjects are most dormant. It is the proper technique for deciduous fruit trees, roses and many deciduous species. However, winter may not be the best time to prune certain evergreen species. Dormancy may not be such an advantage for them. It limits the ability to outgrow the evidence of pruning or shearing.

For example, an English laurel hedge appears quite tattered immediately after shearing. As it resumes growth at this time of year, it recovers very efficiently. Therefore, it does not appear to be tattered for very long. However, recovery would have been quite slow while growth was slower during winter. Autumn and winter are not good times for such pruning.

Actually, this is a good time to prune or shear all sorts of evergreen hedges. Pittosporum, privet, xylosma and boxwood all recover efficiently from such techniques. They will likely need pruning again, and perhaps a few times, through summer. Then, their growth slows sometime during autumn. Hopefully, they will not need pruning until the following spring.

Some evergreen shrubbery blooms for spring, though. Premature pruning would deprive them of such bloom. Laurustinus is likely already finished blooming, so may be ready for pruning now. Lemon bottlebrush, though, blooms somewhat later. If possible, its pruning should occur after its primary late spring bloom. It will hopefully not grow too big by then.

Photinia is now generating appealingly coppery red new foliage. Pruning would remove much of such foliage, so should be a bit later if possible. Then, shearing as foliage turns green would promote another phase of red new foliage. Of course, photinia trees are too large for such shearing. Also, trees bloom more than regularly pruned hedges or shrubs. Some find the floral fragrance of photinia bloom to be objectionable.

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Ferns Are Splendid Foliar Perennials

Ferns exhibit distinctive form and texture.

Ferns are an odd bunch within home gardens. They lack floral color and fragrance. They produce no fruit or vegetables. The few that are deciduous lack autumn foliar color here. With very few exceptions, they provide no shade. There is quite a bit that they do not do. Yet, they are notably popular for their lush foliage, intricate textures and distinctive forms.

Almost all ferns are a rich deep green. Some are vibrantly lighter green. A few are silvery gray or exhibit intricate silvery patterns. Most exhibit lacy textures. Several are finer than most. Several develop relatively coarse textures. Bird’s nest fern has large but undivided and glossy fronds. Holly fern exhibits coarse texture of fronds that resemble holly foliage.

Most ferns that are popular here are evergreen foliar perennials. They are therefore tidier with occasional grooming to remove deteriorating old foliage. Some extend new foliage above old foliage as the old foliage lies down. Some regenerate lushly after the removal of all their foliage prior to their growing seasons. Deciduous ferns are uncommon locally.

Ferns do not develop stems or trunks like some other vegetation does. They sprawl over the ground with fleshy rhizomes. Tree ferns grow upward only by extending roots into the deteriorating rhizomes below. Such roots are quite strong and wiry, and form what seem to be trunks. Fern roots are rather fibrous. Fern rhizomes grow in length but not diameter.

Because of their fibrous roots, ferns are complaisant to confinement within pots. Several are splendid houseplants. Boston fern is an old fashioned but familiar example. Rabbit’s foot fern, maidenhair fern and bird’s nest fern are also popular as houseplants. Staghorn ferns are weirdly epiphytic. They can grow outside on vertical boards rather than in pots.

Most popular ferns are understory species. That means that, within their natural habitats, they live in the shade of larger vegetation. It also means that, within home gardens, most tolerate partial shade. A few actually prefer it. Most ferns also prefer systematic irrigation. Although, native Western sword fern tolerates both partial shade and lapses of irrigation.

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Watering Resumes With Drier Weather

Irrigation becomes necessary without winter rain.

Even before the last day of winter on March 20, the weather went summery fast. Not only has there been no rain in quite a while, but it has become rather warm also. This climate here can be tricky like that sometimes. While moisture becomes less available from rain, it also becomes more necessary. Watering, or irrigation, needs to resume to compensate.

Watering had not been much of a concern during rainy weather through winter. Only pots and planters that are sheltered by eaves still needed it. Between rainy weather, cool and humid weather inhibited evaporation. Therefore, watering was rarely if ever necessary to compensate for a lack of rain. Even sheltered planters needed less than during summer.

Lack of rain and warmer weather are not the only reasons for the need for watering. Day length is slowly but steadily increasing. Sunlight intensity increases as the sun becomes higher in the sky. Lengthening days of intensifying sunlight accelerate the desiccation of soil. It also accelerates evapotranspiration, which is the evaporation from foliar surfaces.

Furthermore, warming weather accelerates growth of vegetation. This increases its need for moisture that rain no longer provides. Formerly dormant deciduous species will soon develop foliage. They did not lose moisture to evapotranspiration while dormant, but will when foliated. Of course, different types of vegetation demand different types of watering.

Soil texture and composition is also relevant to this increasing need for watering. Sandy soil drains well, but consequently needs more watering than denser soil. Organically rich soil retains moisture more effectively. Potted plants need frequent watering because their roots can not disperse very far. Hanging potted plants want even more frequent watering.

With so many variables, there are no simple formulas for determining watering rates. The process ultimately relies on diligent observation of the soil and vegetation involved. Soil, for many plants, should not remain too dry for too long. However, it should not remain too saturated either. Whether irrigation is automated or manual, it must adapt to the weather.

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Flowering Trees For Spring Bloom

Flowering cherry trees are conveniently compact.

Fruit trees such as apricot, cherry, peach and plum, bloom about now. Some are already finished, while a few are just beginning. Apple and pear trees will bloom somewhat later. More colorfully, flowering or fruitless counterparts of such trees are on similar schedules. Flowering apricot has already finished bloom. Flowering crabapple will likely bloom last.

The difference between fruit trees and their flowering counterparts is not their bloom. It is their fruit or lack thereof. “Flowering” has become a euphemism for “fruitless”. Trees with such designation produce either no fruit or fruit of relatively inferior quality. Wildlife might enjoy some of any inferior fruit. Although, even inferior crabapples might make good jelly.

Purple leaf plums are probably the most popular of this type of flowering or fruitless tree. Flowering cherry is less common. Flowering peach is somewhat rare. Fruitless pear is a popular street tree, but may not bloom as profusely as the others. Also, it does not bloom quite as early. Flowering quince grows as shrubbery rather than trees with upright trunks.

While very closely related, fruiting trees and their fruitless counterparts are very different. Fruiting trees should obviously produce fruit. That is their primary purpose. Their fruitless counterparts are merely ornamental. The truly fruitless types grow and bloom where fruit would be a messy nuisance. For example, some perform well as small scale street trees.

Because they are fruitless, such trees do not require specialized dormant pruning. There is no need to prune to concentrate resources into developing fruit. Nor is there any need to prune to accommodate the weight of fruit. Fruitless trees can assume their natural form and scale instead. Although none are large trees, they can grow taller than fruiting trees.

Also because they are fruitless, their bloom is their priority. They bloom more abundantly than fruiting trees, and some bloom with double flowers. Floral color is more diverse too, ranging from bright white to rich rosy pink. Some flowering crabapple trees bloom nearly red. Since dormant pruning is unnecessary, blooming stems are splendid as cut flowers.

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Native Species Are Naturally Natural

California poppy is a common wildflower.

Vegetation has always been here. Wildlands outside of urban development demonstrate that noplace is or was without it. Native species lived here before any home gardens did. Whether intentionally or unintentionally, some of it still does. Some sneaks in like weeds. Some arrives by invitation. A few old trees never left as the area around them developed.

Native species perform well locally because they are adapted to local climates and soils. It is all very natural to them. In fact, many dislike major modifications to their climates and soils. Although most tolerate or even appreciate a bit of supplemental irrigation, some do not. Many rot if irrigation is too generous. Also, many do not want much soil amendment.

Some native species might be a bit too natural, though. Because they are from chaparral climates, they can get somewhat scraggly by summer. It is not because of a lack of water or other environmental deficiency. It is their natural behavior, and how they survive in the wild. Many wildflowers that bloom so well for spring are completely dormant by summer.

The advantage to this is that almost all native species do not demand much water. Many want none at all. Once established, they get all they need from natural rainfall. Therefore, landscapes of mostly or exclusively native species conserve water. Since native species are adapted to endemic soil, they require no fertilizer either. They are quite conservative.

California poppy, which is the State Flower of California, is a very familiar native annual. Unlike other native species, it appreciates supplemental irrigation after the rainy season. It typically blooms only for spring, but may bloom into summer with occasional irrigation. Sky lupine is another native annual that blooms for spring, with contrasting blue flowers.

Various salvias, bush lupines, penstemons, irises and grasses are native perennials. So are sticky monkey flower, Oregon grape, tree anemone and tree poppy. Toyon, silk tassel and various California lilacs are native shrubbery. So are flannel bush, coyote brush and coffeeberry. California sycamore, coast live oak and redwoods are common native trees.

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Weeds Grow Fast Before Spring

English daisy is a pretty weed.

Vegetables and annuals should be growing well with such pleasantly warming weather. Soon enough and into spring, most should be growing like weeds. Unfortunately though, they are not alone. Undesirable vegetation competes with them for limited resources and space. It is a sadly unavoidable problem, even among the most refined of home gardens.

According to their simplest definition, weeds are undesirable vegetation. Obviously, most of the familiar sorts are annuals or perhaps perennials. However, trees, vines and shrubs can be weeds as well. Silver wattle is an invasive tree which can be difficult to eradicate. English ivy is an invasive vine among many forests. Glossy privet is invasive shrubbery.

With few exceptions, weeds are exotic. In other words, they are not native locally. Native species are generally complaisant within their natural ecosystems. They become weeds only if they become undesirable. For example, native poison oak may grow within home gardens. Native bay trees and some oaks frequently appear where they are undesirable.

Most exotic weeds were not always so undesirable. Some were formerly popular for their ornamental qualities, and then naturalized. These include pampas grass, yellow flag iris, Hottentot fig and periwinkle. Wild mustard likely naturalized from home gardens where it grew as a vegetable. Many naturalized grassy weeds were originally fodder for livestock.

The smaller but prolific weeds are the most problematic for home gardens. They include dandelion, purslane, burclover, various spurges and various thistles. Of course, there are too many to list. They grow and disperse their seed much more efficiently than desirable vegetation. That is how they invade home gardens and become such a prolific nuisance.

That is also why it is so helpful to remove weeds as soon as possible. Their subsequent generations will be less profuse if they disperse less seed now. Besides, they are easier to pull while only beginning to disperse roots within moist soil. They will be more difficult to pull when more established in drying soil later. Weeding may be tedious nonetheless.