Planters Are Overrated But Functional

Some plants should always be confined.

Container gardening is overrated. The endemic soil here is not so bad that nothing will grow in it. What is now suburban gardens was formerly famously productive farmland! Soil amendments make the soil more comfortable to plants with more discriminating taste. Plants that are too discriminating are probably not worth accommodating. With few exceptions, planters are unnecessary.

Plants naturally want to disperse their roots into the soil. Drought tolerant plants disperse their roots even more extensively. That is how they find enough moisture to be drought tolerant. If deprived of such root dispersion, they are always reliant on watering. Plants prefer the insulation of soil too. Many types of planters can get uncomfortably cool in winter, and uncomfortably warm in summer.

Besides, planters clutter landscapes, and occupy space on hardscapes. Decks rot. Patios stain.

The main advantage of planters is their portability. Plants that are sensitive to frost can move to shelter before the weather gets too cool. Plants that are spectacular only while blooming can move for more prominent display during bloom. For those who have not settled into a permanent home, plants in planters are able to relocate. Planters on patios or decks can move about like furniture.

Houseplants obviously grow in planters because not many houses contain enough soil for them to live in. Houseplants can move about just like planters in the garden. That is helpful for those that need a better exposure for winter than they enjoy for the summer. Some might like to go into the garden during mild weather, or for a rinse in light rain. Cascading plants can hang from the ceiling.

Planters can effectively confine invasive plants as well. Montbretia is so invasive that some people will not grow it without containment. (Deadheading to prevent seed dispersion is important too.) Horseradish often grows in tubs for confinement, as well as to facilitate harvest. It is easier to dump the potting media from a planter, and separate the roots out, than to dig roots from the ground.

Burro’s Tail

My pictures are missing, so I found this one online without copyright protection. It demonstrates the cascading habit of burro’s tail.

Back when big spider plants or Boston ferns suspended in fancy beaded macrame were all the rage through the 1970’s, burrow’s tail, Sedum morganianum, was an unusual but also trendy succulent perennial for sunny spots in the home or sheltered and slightly shaded spots in the garden. The refined foliar texture and light bluish green color contrasted nicely with the big and deep green leaves of comparably trendy philodendrons. The thin stems are too limber to stand up, but cascade excellently. Plants in the garden that get pruned back while dormant in winter can easily get two feet long through summer. Without pruning, big plants can get longer than six feet. Pruning scraps and even the small but plump leaves can be rooted and grown into new plants. It is impossible to prune or even move burro’s tail without dislodging some of the leaves anyway. Watering should be regular but not excessive, but then minimal for plants in the garden through winter.

Potted Plants Need Work Too

Potted plants do not have much soil volume to work with.

Potted plants can be a problem any time of the year. Some want more water than get. Most get too much water or do not drain adequately. Large plants get constricted roots if pots are too small. The roots of some plants get cooked in exposed pots that collect too much heat from sunlight. Besides, too many pots just seem to be in the way in otherwise useful spaces on decks, patios and anywhere else trendsetting landscape designers want to put them.

Now that the weather is getting cool and rainy, potted plants are not as active as they were during warm weather. Many are dormant. Although few demand the attention that they got during warmer weather, plants still need to be tended to appropriately through autumn and winter.

Cool season annuals, which are also known as ‘winter’ annuals, should get groomed as long as they are performing in the garden, just like warm season annuals get groomed through summer. Deteriorating flowers should be plucked from pansy, viola, primrose, Iceland poppy, calendula, dianthus, stock, chrysanthemum and cyclamen because they can mildew and spread mildew to developing flowers and foliage. Unplucked cyclamen and calendula can develop seed which diverts resources from bloom.

Pots that are out in exposed areas will not need to be watered while they get enough water from rain. The problem is that many that do not drain adequately can get too much water from rain and stay saturated. Dormant and defoliated plants do not need much moisture at all. Even evergreen plants do not need as much as they do while active during warm weather, because cool and humid weather inhibits evapotranspiration (evaporation from foliar surfaces).

Potted plants under eaves also need less water while the weather is cool and humid, but need to be watered nonetheless because they are sheltered from rain. Plants in hanging pots typically drain and dry more efficiently, so probably want a bit more water. Even a few sheltered small plants in the ground may occasionally want to be watered during rainy weather if they do not extend enough roots where they can get moisture from rain beyond the sheltered area. Sheltered plants are actually the most likely to be neglected because watering does not seem so important when it is raining.

Angel Wing Begonia

This is not the common Angel Wing begonia. I just found it online, in the pictures that are not protected by copyright. I could not find my picture. Storage has been a problem.

The simple pink or sometimes red or white flowers of angel wing begonia are not as flashy as those of other begonias, and are not abundant enough to provide much color. During warm weather, they are merely a minor bonus to the striking foliage. As the name implies, the big and angularly lobed leaves are shaped like wings of angels. Upper surfaces are glossy and dark green with irregular silvery spots. Undersides are even glossier and reddish bronze. With support, the lanky cane stems can get more than twelve feet tall. However, because older tall canes produce runty foliage, they are often pruned out to promote more vigorous and lushly foliated young canes.

Because they are sensitive to frost, and also because they are ideal houseplants, angel wing begonias are typically grown in containers. They like rather regular but not excessive watering, and rich potting soil. Abundant sunlight enhances foliar color; but harsh exposure roasts foliage. Partial shade is not a problem.

Horridculture – Dumpster View

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Location – Locations – Location

Rather than addresses, most of the guest cabins at the conference center where I work for part of the week, have delightfully horticultural names; such as Camellia, Lupine, Holly, Dogwood, Huckleberry, Strawberry and Cottonwood. Others have names that are suggestive of idyllic locations, such as Meadowbrook, Creekwood and Rustic Dell. Then, . . . there is ‘Dumpster View’.

Dumpster View is not actually a guest cabin, or a lodge, or any building that any of the guests would ever see. It is part of our maintenance shops buildings. Although large, these building are outfitted with only a few windows. The largest building has only a single window for an office. The smaller building has only four windows. Two of the windows have a view only of dumpsters.

The picture above shows the view from the window in the galley. It was what I saw as I made coffee for the crew in the mornings back when we all were still working. As many as fifteen big dumpsters have congregated in that herd, right outside, beyond the spider plant. Because the area is a paved driveway with significant traffic, I can not even plant a tree to obscure the view.

No amount of houseplants bigger than the spider plant can obscure this view without becoming obtrusive. Hanging pots outside the window might detract from the outer scenery, but would require more attention than I want to devote to them. Curtains would be the most practical solution, but would get grungy in this particular situation. Besides, no one else here really notices.

Horticulture is not for everyone, and can not fix everything. No one stays in the shops buildings long enough to notice how horrid the views are anyway. We all leave to go to work in scenery that others vacation in.

Finally! A White Cymbidium!

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This is what a simple white Cymbidium orchid should look like.

Cymbidium orchids have been popular here for as long as I can remember. Back when horticultural commodities were still more commonly grown around the San Francisco Bay area, many genera of orchids, particularly Cymbidium, were grown in acres of greenhouses in the hills of South San Francisco. They are still grown near the coast of San Mateo and Santa Cruz Counties.

In home gardens, they are often pampered under the shelter of lath, where they are protected from frost and direct exposure to sunlight. Some Cymbidium orchids live and bloom for many years or decades, and sometimes get divided into more as they get overgrown, just like lily-of-the-Nile. Some live longer than those who originally grew them, and go live with someone else.

I never pampered my Cymbidium orchids. I grew all of them out in the garden, with only a bit of partial shade from larger trees. I never once potted any of them into the coarse fir bark that Cymbidium orchids supposedly need. I grew most in dirty and uncomposted oak leaves. I put some in rotting stumps to accelerate the rot. They were happy, and bloomed remarkably well.

None of mine were purchased. They were all acquired from neighbors, clients or colleagues. Of the many Cymbidium orchids that I have grown, none were white! Yes, I wanted a white one. I just do not admit to it.

After maintaining it for more than a decade, and bringing it from a former home hundreds of miles away, a colleague brought me this Cymbidium orchid. Although I did not want him to pass it along after so many years, I was pleased to take it, particularly since it blooms white. Then, it started to bloom, immediately after arrival! Ah, if only there were more people here to see it!

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I do not know why the individual flowers are so huddled together.

Boston Fern

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This fern is nowhere near Boston.

It is not actually from Boston. The first Boston fern, Nephrolepis exaltata ‘Bostoniensis’ was merely discovered in Boston, as a mutant in a shipment of otherwise normal ferns. Unlike the more upright parent plants, Boston fern has softly arching fronds that can hang vertically at the ends.

The fronds are typically about a foot and a half long, and can be a few feet long in humid and partly shady environments. Each frond is comprised of many pinnae that are neatly arranged on both sides of a wiry rachis (leaf stalk). Each leaflet is an inch or two long or longer. Delicate aerial roots sometimes dangle below the foliage.

Through the 1970’s, Boston fern was one of the most popular houseplants. Yet, it really prefers more humidity than it gets inside. It is actually happier on porches or in atriums where it is sheltered from frost and harsh sun exposure. It prefers partial shade outside, but likes abundant ambient sunlight as a houseplant.

Ferns Are Made For Shade

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Ferns are famous for distinctive foliage.

Without color or fragrance of flowers, ferns provide some of the most distinctive foliage in the garden. They do not turn color in autumn. Only a few tree ferns develop sculptural branch structure. Yet, they do their job well, and many are happy to do so in spots that are a bit too shady for other plants.

Almost all ferns are low perennials that produce foliage that arches outward from the center. Some can get quite broad. A few tree ferns grow upward on trunks (although the trunks are merely tough roots that grow through decomposing stems). Australian tree ferns can get quite tall and broad where sheltered from wind.

The staghorn fern is a weird epiphyte that naturally clings to tree trunks or rock outcroppings where it collects organic debris that falls from trees above. In home gardens, it is popularly grown on wooden plaques or as a hanging plant. Hanging plants do not necessarily need pots, or sometimes engulf their pots as they grow.

Leaves of ferns are known as ‘fronds’, and with few exceptions, are intricately lobed or divided into smaller leaflets known as ‘pinnae’, which are arranged on opposite sides of leafstalks known as ‘rachi’ (or singularly as ‘rachis’). The staghorn fern has unusually branched but otherwise unlobed fronds. The bird’s next fern has has distinctively simple fronds without any lobes or pinnae.

Most of the popular ferns are naturally understory plants that grow below larger plants. Even most tree ferns grow amongst larger trees. This is why so many ferns tolerate shade so well. In fact, many prefer partial shade, and will actually fade or scorch if too exposed. However, it is also why so many ferns prefer rich soil with an abundance of organic matter.

Maidenhair, rabbit’s foot, bird’s nest, holly, Boston and a few other ferns are popular as houseplants. Because home interiors are a somewhat arid for them (lacking humidity), some ferns like to be misted daily. Ferns respond well to regular but light application of fertilizer. Too much fertilizer can roast foliage.

Because ferns are not expected to bloom, nitrogen (which can inhibit bloom for some plants) is not a problem. Ferns that are out in the garden can therefore get fish emulsion or a bit of the same sort of nitrogen fertilizers that keep lawns green.

Foliage Is Meant For Weather

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Lush foliar houseplants enjoy occasional rinsing.

Foliage needs sunlight for photosynthesis. Foliage needs air for respiration. Roots need moisture to sustain foliage. Houseplants can technically get all of what they need from the confinement of their pots within the interiors of homes and other buildings. They only require sufficient moisture to be delivered to them, and sufficient sunlight from windows. The air is the same that we all utilize.

However, there is no substitute for nature. While hydroponics and synthetic light facilitate yet more deprivation of what is natural, the plants involved would appreciate more consideration. Without exception, domesticated plants are descendants of plants that grew wild somewhere. Those that dislike local weather would be pleased with the weather of their respective ancestral homelands.

Most of the popular houseplants that are grown for their lush foliage originated from tropical forests. Many were understory plants that prefer the shade of larger trees. That is how they tolerate the relatively shaded interiors of buildings. Now that they are here as houseplants, they appreciate shelter from frost. They probably miss rain, humidity, sporadic breezes and tropical warmth though.

Rinsing tropical foliage plants in the shower eliminates some of the dust that they accumulate where air stagnates. Rinsing them out in the garden is even better because it does not make such a mess in the shower. What is even better than both of these options is allowing a gentle rain to rinse the foliage. Plants only need to be moved to a windless spot prior to an expected rain shower.

The weather was much too cool earlier in winter. There will be no rain later in summer. This time of year, and again next autumn, the weather is safely mild; and eventually, a few showers are likely. Timing is critical. Plants should be brought out just prior to rain, and brought in before the weather gets sunny. Foliage that has always been sheltered is very sensitive to scald from direct sunlight.

Saucers and pots can be cleaned while outside. Crowded plant can be repotted.