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Ornamental Foliage Augments Spring Color

Variegation contrasts nicely with darker foliage.

Spring bloom is the most colorful color in the garden here. It is not the only color though. Some deciduous foliage will provide color at the opposite end of the year. Bark can add a bit of color, particularly while deciduous trees defoliate for winter. So can colorful fruit. Furthermore, ornamental foliage, both deciduous and evergreen, can contribute color.

Ornamental foliage is not the same as deciduous foliage that is colorful only for autumn. The distinction is that it is colorful from the beginning. Generally, it is most colorful while fresh during spring. If both deciduous and colorful for autumn, it changes from one color scheme to another. If evergreen, it may remain more or less colorful throughout the year.

Ornamental foliage of this sort displays various colors and patterns. Variant colors might be yellow, orange, red, purple, blue, pink, bronze, white or gray. They can be variegation such as stripes, margins, blotches, spots, patterns or blushes. Alternatively, they can be monochromatic. Most fade to some degree during the warm and dry weather of summer.

The colors of ornamental foliage are not as vibrant as floral color. They are not intended to attract pollinators. In fact, most of such color serves no practical purpose. Blue, gray or white foliage mostly originates from high altitudes or harsh desert climates. It reflects a bit of excessive sunlight to avert scorch. Most other ornamental foliage is mere mutation.

In the wild, such mutant foliage is generally a disadvantage. White portions of variegated leaves contain less chlorophyll. Consequently, they can not photosynthesize as much as green portions. Such foliage only perpetuates unnaturally within cultivation because it is appealing. Some mutant ornamental foliage can revert to more vigorous greener growth.

Ornamental foliage can be annual, perennial or woody. New Zealand flax, canna, coleus and caladium are the most variably colorful. Coprosma and various pittosporum are a bit more limited. Euonymus, hosta and ivy display white or yellow variegation. Smoke tree, redbud and some maples are surprisingly diverse. Agave blue spruce and some junipers can contribute gray and blue. There are too many options to mention.

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Hair Grass

This is one of the more complaisant of ornamental grasses.

A rather sloppy style of the 1970s combined with a weird color of the 1980s might explain the resemblance of hair grass, Muhlenbergia capillaris, to real hair. The lime otter-pop green color of the foliage, which looks so fresh in the garden, is actually quite dated for hair. So is the pleasantly soft texture. The sparse, fuzzy cloud of purplish pink bloom that hovers just above the foliage in autumn is extraordinary, although only slightly more contemporary for hair color. Happy hair grass plants that get plenty of water in sunny spots can get more than two and a half feet tall. Yet, the perennial foliage is so soft that it tends to fill in space between other sturdier plants instead of overwhelming them.

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Ornamental Grasses

Pampas grass was once appreciated for its appealing foliar texture and strikingly elegant bloom.

Lawns are among the most useful of landscape features, but are also the most horticulturally incorrect. They require such constant maintenance and so much water that they give grass a bad reputation. Yet, the turf grasses that are used for lawn are actually a minority among grasses. There are so many more grasses, including a few turf grasses, that can add color, texture and the seldom considered asset of ‘motion’ to the landscape.

Most grasses move nicely in a breeze. Old fashioned pampas grass, with remarkably limber and long leaves, is one of the best for motion. As if the elegant foliage were not enough, billowy white flowers on tall sturdy stalks nod gracefully in season. (However, pampas grass gets quite large, has potentially dangerous foliage that can cause nasty paper cuts, and in rural areas, can escape into the wild to become an invasive weed.) Red fountain grass does the same on a smaller scale that is more proportionate to suburban gardens.

Red fountain grass also provides striking brownish red foliage. Blue festuca and larger blue oat grass, although insensitive to a breeze, provide really excellent pale blue foliage. The most popular variety of miscanthus grass is variegated with white. Hair grass is a weird yellowish green that resembles that of a rubbery fishing lure.

Besides the odd color, hair grass also has an oddly soft texture that allows it to spill over the edges of retaining walls and pots, with delicate autumn flowers that hover above like a swarm of gnats. Mexican feather grass seems somewhat coarse up close, but has the uniform texture of wheat at a distance. Switchgrass has a more rigid texture, and stands more vertically than other softer grasses. Feather reed grass does both, with flowers that stand vertically above the soft billowy foliage below.

There are as many different kinds of grasses as there are variations of color, texture and motion. Only a few are annual. Almost all are perennial. There are a few in between; perennials that die out in a few years. Most grasses are only a few feet tall. Some never get taller than a foot. Yet, a few get several feet tall.

Most grasses are at their best if they get cut to the ground every few years or even annually. However, some need no maintenance except only for watering. If satisfied with watering, some grasses can sow their seed to cover the outskirts of a landscape, and can be an appealing alternative to ground cover. There are even a few grasses that will naturalize without watering.

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Foliar Color Goes Beyond Green

Foliar color can exceed floral color.

New England is famous for spectacular foliar color through autumn. Such color is merely seasonal though, and almost exclusive to deciduous vegetation. With few exceptions, its color range is limited to variations of yellow, orange, red or brown. It happens thousands of miles away, and is difficult to replicate on such a grand scale with locally minimal chill.

For smaller scale home gardens, there are many options for foliar color at any time of the year, regardless of chill. Some are deciduous. Most are evergreen. Colorful foliage might exhibit variegation or monochromatic coloration. Variegation might involve stripes, spots, borders, veining, or any combination of divergent colors. Some might entail a few colors.

Besides autumnal yellow, orange, red or brown, foliage can be pink, purple, blue or gray. Variegation can feature any of these colors, as well as white. The size and form of plants with foliar color ranges from small annuals and perennials to vines, shrubbery and trees. A few of such plants that are deciduous might change to different colors through autumn.

Various Hosta, Euonymus, Coprosma, Pittosporum, Hedera and Bougainvillea are some of the more popular plants with white or yellow variegation. New Zealand flax is popular for bronze, brown, gold or pink variegation. Canna can display evenly bronze or purplish foliage, white patches on green foliage, or neat yellow and pink stripes of varying widths.

Purple leaf plum and some cultivars of smoke tree, beech Eastern redbud and Japanese maple have the best purplish foliage. Other cultivars of smoke tree, as well as arborvitae, juniper, Monterey cypress and honeylocust, generate impressively yellow foliage. Agave and blue spruce contribute soft blue. Coleus impresses with various color combinations.

Whether deciduous or evergreen, most colorful foliage displays its best color while fresh and new in spring. For some, color fades through summer. Junipers that are gold through spring may be plain green by summer, particularly in dry conditions. Although light colors and variegation are appealing within shady situations, shade can inhibit such coloration.

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Palms Are Very Distinctive Among Trees

Palms provide distinctively lush foliar texture.

Palms seem to exemplify the culture of California. However, only the California fan palm, which is also the desert fan palm, is native. All others are exotic. With its dwarf palmetto, Oklahoma has as many native palms as California. Furthermore, the California fan palm is only endemic within remote riparian ecosystems of the Colorado and Mojave Deserts.

Common date palms were likely the first of the many exotic palms in California. Spanish Missionaries imported them for date production during the Eighteenth Century. Although initially utilitarian rather than decorative, recycled trees from displaced orchards became popular for larger landscapes. Potentially messy fruit is minimal without male pollinators. 

Long before urbanization displaced date orchards, many other palms came to California merely because of their visual appeal. Some are large enough to be shade trees. Others can provide shade in groups. Many develop elegant trunks or sculptural form. Some stay relatively low or shrubby. All innately provide famously and luxuriantly evergreen foliage.  

Palms are most certainly appealing within appropriate situations. They are very different from other trees though. Like arborescent yuccas and cordylines, palms are ‘herbaceous trees’. Unlike yuccas and cordylines, and with very few exceptions, palms do not branch. Nor do their trunks continue to expand in width as they continue to grow in height above.  

Palms consequently spend their first few years widening their bases at ground level. Big palms, such as Canary Island date palm, likely require many years. Once their bases are adequate, developing palms ‘launch’ into vertical growth. Although palms do not branch, a few, such as Mediterranean fan palm, develop multiple trunks from their primary bases. 

Once palms launch, they grow only upward. They lean only to avoid shade, or if pushed by wind. It is impossible to direct their bulky but singular terminal buds around obstacles, such as utility cables. It is also impossible to contain their shade as they get high enough to shade adjacent areas instead. Many palms are spiny, so are difficult to prune properly, even while young and within reach.