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Six on Saturday: Brief Winter

Winter is the busiest season here. There is no more to do during winter here than here is anywhere else, but there is a bit less time in which to do it all. Dormant pruning must be done prior to the last frost, and the first bloom. Planting should be done prior to the last rain, especially for small plants and seedlings such as most of these. Even after the most torrential weather since 1982, winter weather here can not maintain dormancy for long. Even if it would do so for more species, canna may not cooperate. I suspect that some of its ancestral species were familiar with frost without winters in the tropical Andes. They survive frost, but are too eager to grow immediately afterward.

1. Lupinus arboreus, bush lupine is a gift from a local nursery that grows native species. They were getting too mature to be marketable. We got a dozen. They grow wild nearby.

2. Lantana camara, lantana is coppiced annually after getting a bit frosted, but prior to regeneration. This unexpected seedling was also coppiced, but relocated in this process.

3. Canna indica, canna does not seem to know what winter is. It survives frost, but tries to regenerate immediately after experiencing it, instead of waiting for the end of winter.

4. Scilla peruviana, squill seems like it should be just as familiar with winterless frost in Peru, near the Equator, but is actually a Mediterranean species. Three are blooming late.

5. Amaryllis belladonna, naked lady generates too many seed. I again made the mistake of collecting some two seasons ago. What now? These actually get put out while foliated.

6. Cedrus deodara, deodar cedar is as prolific, but without my intervention. I pulled and plugged several a few years ago, but most of them were killed by weed whackers anyway.

This is the link for Six on Saturday, for anyone else who would like to participate: https://thepropagatorblog.wordpress.com/2017/09/18/six-on-saturday-a-participant-guide/

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Winter Bloom Might Be Scarce

Some camellia bloom sporadically for winter.

Oregon gardens get to display superior peony bloom for spring and summer. That is one of several advantages of winter chill. Some plant species appreciate a bit more chill than they can get here. It enhances their performance. However, chill also limits winter bloom. Not many plants want to bloom while the weather is cool, and pollinators are less active.

That is one of several advantages of mild winter weather. It allows flowers that bloom for autumn to bloom a bit later. It allows a few of the flowers that bloom for spring to bloom a bit earlier. There is not much time between the last flowers of autumn and the first flowers of spring. Winter bloom is not as important here as where winters are longer and chillier.

Even if less important here, reliable winter bloom might be a bit more challenging. Some plants that bloom for winter in other climates might be hesitant to bloom for winter locally. After all, they prefer to bloom while the weather is cool. Mild chill might be unsatisfactory. Cool season annuals are unpredictable, but are likely the most reliable for winter bloom.

Of the popular cool season annuals, cyclamen is actually perennial. If not removed at the end of its season, it goes dormant for summer, and regenerates for subsequent winters. It does not bloom as profusely as it originally did, but adds color to mixed small perennials or ground covers that do not bloom for winter. Some types of primrose are also perennial.

A few perennials bloom sporadically and randomly throughout the year, including winter. African daisy and euryops daisy typically do not bloom as much as they do during warm weather, but can. Euryops daisy may actually bloom best during winter. Bird of Paradise flowers mature so slowly that those that begin during autumn might finish through winter.

Witch hazel, daphne, heather, mahonia and winter jasmine bloom for winter, but perhaps not as impressively as for other climates. Some camellia bloom abundantly while others bloom sporadically. Bergenia may bloom later here than for other climates. Forsythia and some spring bulbs, especially daffodil, bloom so early that they seem to bloom for winter.

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Citrus Fruit Brightens Wintry Gardens

Summery citrus fruit ripens during winter.

Chilled lemonade certainly is nice when the weather gets warm during summer. Orange juice also seems to be more appropriate to warm weather. In fact, most citrus fruit seems to be more summery than wintery. Yet, most of it ripens through winter. Mandarin oranges are more perishable than most other citrus fruit, so are best long before warmer weather.

Citrus trees are defiantly contrary to the deciduous fruit trees that produce fruits of spring and summer. Not only does their fruit ripen during opposite seasons, but they also prefer pruning during opposite seasons. Many need no pruning or only minor grooming as they age. Any necessary pruning should happen after the last cool or frosty weather of winter.

Citrus fruit is not as perishable as spring and summer fruit are. Mandarin oranges oxidize within a month or so only because their rind is so loose. Other citrus fruit remains fresh in the garden for months, even through warm weather. Some actually improves with a bit of aging. For fruit that lingers late, vermin are more likely to be a problem than deterioration.

Slow deterioration is a major advantage for such abundant citrus fruit. There is less rush to collect more after collecting too much. For more sporadic production, many cultivars of citrus bloom sporadically prior to and after their primary season. ‘Eureka’ lemon is not too overwhelmingly productive in season, but before and after, provides a few more lemons.

Citrus fruit are remarkably diverse. Many are best simply for fresh eating. Many are better for juicing. Some are best for other culinary applications. Mandarin oranges and oranges are basically sweet. Lemons and limes are basically sour. Grapefruits are basically bitter. Citrus fruit exhibits a prevalence within combination of these three basic flavor elements.

Citrus trees are as variable as the citrus fruit that they provide. Almost all are dwarf trees, which stay more compact than standard orchard trees. However, ‘Eureka’ lemon, ‘Marsh’ grapefruit and ‘Sanguinelli’ blood orange can eventually get as big as small shade trees. ‘Meyer’ lemon, kumquats and most Mandarin oranges remain much lower and shrubbier. Some are thornier than others.

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Defoliation And Dormancy Are Justifiable

Wind blows freely past defoliated stems.

Defoliation and dormancy begin early for quite a few species within desert and chaparral climates. California buckeye can defoliate during the driest summer weather, refoliate for autumn, and then defoliate again for winter. They do what they must to avoid desiccation within their arid climate. Many more species do what they must to survive through winter.

That is why so many plant species are deciduous while they are dormant through winter. They shed their foliage when it is more likely to be a liability than an asset. Like summer dormant plants, they respond to inevitable and potentially detrimental weather. Moreover, they respond to seasonal changes of sunlight as well. Plant species are very perceptive.

With few exceptions, deciduous plants are nonconiferous or broadleaf species. More are endemic to regions to the north and south of tropical regions than within tropical regions. They know that sunlight is less intense and daylength is shorter while the sun is at a low angle during winter. Their defoliation coincides with the least usefulness for their foliage.

Most deciduous plant species are also aware of the sort of weather that they are likely to encounter during winter. Cold and stormy weather with wind and rain or perhaps snow is probably familiar to them. They know that foliage is not only vulnerable to damage, but is also burdensome to associated stems. In colder climates, it can accumulate heavy snow.

Foliage is the source of almost all wind resistance within foliar canopies that suspend it. Such wind resistance causes wind to dislodge limbs or blow vegetation over, particularly while soil is moist from rain. Defoliation eliminates much of such risk prior to the windiest and therefore riskiest storms of winter. Bare stems are more aerodynamic than foliage is.

Defoliation seems to happen at the best time, immediately prior to wintry weather. It even increases warming sunlight exposure during the darkest and coolest season of the year. However, defoliation is also messy while the weather is unpleasant for those who go out to rake it away. Without prompt raking, it clogs drainage of rain while it is most important.

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Bare-Root Stock Arrives For Winter

Bare roots might fail to impress.

Spring is overrated. It is obviously the best season for planting warm season vegetables and bedding plants. It is the most colorful season with more flowers in bloom. There is so much more to gardening though. Most plants prefer autumn planting. Some prefer winter planting. That is why this present bare-root season will be so relevant all through winter.

Dormancy is an advantage to stressful procedures such as planting. Spring bulbs prefer autumn or early winter planting while they are most dormant. For the same reason and to avoid late frost, summer bulbs prefer later winter planting. It should be no surprise that so many deciduous woody plants likewise prefer dormant planting during bare-root season.

Bare-root season is simply when bare-root stock becomes available for planting through winter. Unlike more familiar canned (potted) stock, bare-root stock lacks the medium that it grew in. Their roots are literally bare. Most bare-root stock awaits purchase at nurseries with its roots resting within damp sand. Roots of some are bagged within damp sawdust.

Bare-root stock is innately more practical than typical canned stock. It is significantly less expensive. It is much less cumbersome, and therefore easier to transport from nurseries. Planting is easier within much smaller planting holes. Formerly bare roots disperse new roots into their garden soils more efficiently than crowded formerly canned root systems.

Deciduous fruit trees and roses are the most popular of bare-root stock. Most of such fruit trees are stone fruits and pomme fruits. Stone fruits include almond, apricot, cherry, plum, prune, peach and nectarine, as well as their unusual hybrids. All stone fruits are species of the genus, Prunus. Pomme fruits include apple, pear, Asian pear and perhaps quince.

Fig, pomegranate and persimmon trees should also be available. So should grapevines, currants, gooseberries, blueberries and various cane berries. Strawberries, rhubarb and asparagus are perennials that are available bare-root. Except for almond, most nut trees, including English walnut, pecan, filbert or chestnut, may be available only by mail order. Most mail order catalogs are online now.

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Winter Berries Attract Migrating Birds

English hawthorn is like deciduous firethorn.

Bloom and colorful foliage provide most of the color besides green within home gardens during spring and summer. Deciduous foliage becomes more colorful for autumn. Winter berries and a few other lingering fruits become more colorful as deciduous foliage sheds through winter. All this color adheres to precise schedules within a collective ecosystem.

Many plants exploit wildlife. It is how they compensate for their immobility. Many provide incentive for the services that they desire from the wildlife that they exploit. For example, after enticing pollinators with fragrance or color, flowers happily exchange extra pollen or nectar for pollination. Many plants provide edible fruits in exchange for seed distribution.

It is no coincidence that so many different winter berries ripen through autumn for winter. They provide sustenance to many migratory birds who rely on them. Overwintering birds who compete with migratory birds appreciate their efforts as well. Such winter berries are small but abundant, for ‘grab and go’ convenience. Bright color is the best advertisement.

Some people appreciate how winter berries attract birds and squirrels into their gardens. Some appreciate the seasonal color of such berries more than the wildlife. Unfortunately, wildlife decides the outcome, and such outcomes are variable. It is impossible to predict if berries will disappear as they ripen, or linger as they deteriorate through most of winter.

Firethorn is likely the most familiar of the winter berries here. It seems to be more prolific with its brilliant red berries than any other species. Some old fashioned cultivars produce bright orange or perhaps even bright yellow berries. Some sorts of cotoneaster resemble firethorn, but with subdued rusty or orangish red display for less refined woodsy gardens.

Toyon, or California holly, is most prolific with winter berries where it grows wildly without pruning. It gets big though. Real hollies, which are more popular in other regions, do not produce many berries locally, particularly since male pollinators are uncommon. English Hawthorn is a small deciduous tree that displays berries that resemble those of firethorn, but on bare stems.

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Frosted Foliage Is Ugly Foliage

Frosted foliage can be removed now.

Weather is variable everywhere. Climates and seasons are imprecisely regulating. They merely define predictable ranges of the elements of weather, such as temperature, wind, humidity, precipitation and cloudiness. As unusual as weather sometimes seems to be, it generally conforms. Winter weather is mild here, but sometimes leave vegetation frosted. 

Frost was sneaky this winter, by occurring during nights between pleasantly warm days. All elements of the weather were within ranges that are normal for local climate, but their chronology was deceptive. Frost seemed unlikely after such springlike daytime weather. Some foliage was frosted only because protection from frost seemed to be unnecessary.

Frost is now unlikely for most local climates so late in the season. Only climates that are at significant elevation or significantly inland might still experience frost. Coastal and low elevation climates are generally past their last frost dates. Some climates experience no frost at all. Except for within the coolest situations, no more vegetation should be frosted.

Therefore, it is generally safe to prune and groom away unsightly frosted vegetation. It is no longer helpful to insulate undamaged vegetation below. Any new growth that pruning of this nature may stimulate or expose should be safe from frost. Within climates that lack frost, vegetation that gets shabby from chill might also appreciate pruning and grooming.

Pruning and grooming of frosted vegetation can be challenging. Many frosted plants are already actively growing in response to warmer weather. Their new growth mingles with their damaged growth that must be removed. Efficient separation of the two requires a bit of effort and persistence. Fresh and tender new growth is innately vulnerable to damage. 

For example, small new shoots of angel’s trumpet break away very easily if bulky frosted stems fall onto or through them in the process of removal. New shoots of several types of canna emerge from the soil among old shoots while it is too early to cut the old shoots to the ground. Grooming is easier where it can happen earlier, or for cannas that grow later. 

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Warmth Accelerates Early Spring Bloom

Deciduous fruit trees should remain dormant.

Unseasonable warmth and dryness has been great this winter. Such weather is often an advantage of this locally mild climate. Chill never gets too harsh. Rain does not continue for too long. However, even by local standards, the weather has been unusually dry and warm for quite a while. Although appealing to people, it can get disruptive horticulturally.

Obviously, a lack of rain eventually becomes a lack of moisture. Some evergreen plants, potted plants, ground cover plants and lawns may already need watering. Although rain, or lack thereof, does not affect availability of water from municipal sources, it determines when irrigation with such water becomes necessary. It will be sooner than later this year.

Obviously, warmth accelerates this process. It draws moisture both from intact evergreen foliage and the soil below. (Dormant deciduous plants still do not lose as much moisture without foliage.) Unseasonable aridity (minimal humidity) and wind intensify the effect of unseasonable warmth. Desiccation is not the worst consequence of the weather though.

Unseasonable or premature warmth might stimulate premature spring bloom and growth. This can be very disruptive for plants that rely on sustained chill to maintain their minimal dormancy requirements. Peonies that are marginal where they normally experience their minimal chill requirements might be dissatisfied with inadequate chill through this winter. 

Even for plants that do not require much or any chill, premature bloom can be vulnerable to normal aspects of wintry weather if and when it resumes. Flowering cherry trees might bloom during sustained warmth. Such bloom would be quite susceptible to damage from resuming winter rain. Resumed chill might stall premature magnolia bloom until it molds. 

Prematurely developing fruit, accelerated by unseasonable warmth, is also vulnerable to resumption of wintry weather. Heavy rain, which is still possible through the remainder of winter, can dislodge freshly pollinated flowers, or small fruit as it begins to develop. More developed fruit is vulnerable to rot or mold during cool and damp weather prior to spring.

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Six on Saturday: Winter Lite

There is not much time to finish all of the winter chores. Deciduous plants defoliate a bit late and refoliate a bit early. They do not stay bare for long. Roses were a priority for this week. We managed to prune all of them, and relocate several of them as well. Their buds are plump but still dormant. Although the weather has been pleasantly mild for the past several days, it has been more seasonably cool and even frosty for night. Seriously, there was genuine frost and even ice! It would not impress those who are familiar with wintry weather, but it makes our work a bit less rushed. All that we need now is a bit more rain. 

1. Pruning roses is one of my favorite winter chores. It is almost as much fun as pruning fruit trees. Just a few are my favorite hybrid tea roses though. This is merely understock.

2. Carpet roses are the most common roses in our landscapes. I loathe them. However, I have been enjoying some of them. The smaller of two big colonies generated this debris.

3. Salvia greggii appeared mysteriously near some of the roses last year. Seriously, it is a mystery. I like it enough to layer the stems from the right for little new plants to the left.

4. White fir appeared mysteriously behind the Salvia greggii just recently. It lacks roots! Excellent! It can not damage pavement or septic systems! I should propagate more of it.

5. Angel’s trumpet has been confused since it arrived. It bloomed before developing new foliage last spring, stopped blooming before autumn, and now, is trying to bloom again!

6. Winter is famously mild here. Nonetheless, the weather sometimes gets cool and even frosty. On rare occasion, it gets cold enough for icicles. This appeared here on January 2. 

This is the link for Six on Saturday, for anyone else who would like to participate:

https://thepropagatorblog.wordpress.com/2017/09/18/six-on-saturday-a-participant-guide/
Posted on by tonytomeo · 6 Comments

Summer Bulbs After Spring Bulbs

Summer bulbs start late in winter.

It was easy to bury spring bulbs so discourteously in shallow graves last autumn. None of them got proper funerals. Perhaps cool season annuals obscured their interment sites. No one needed to know they were there. It seemed like a perfect crime, until now. They are back like the undead. After all, they were not dead when interred. They were merely dormant, and likely plump and healthy.

Crocus, snowdrop, narcissus and some of the other related daffodil might already be blooming. Otherwise, their foliage is emerging above the soil. They do not necessarily wait for the soil to get warmer later in winter. Hyacinth and tulip will bloom a bit later. Delayed planting delays bloom, but only for the first season. Established spring bulbs from previous seasons will bloom as they like.

Spring bulbs, including corms, rhizomes, tubers and tuberous roots, prefer early interment for a reason. They appreciate a good chill through winter. Although most get refrigerated artificially prior to sale, they certainly do not mind a bit more chill. Besides, they also appreciate early root dispersion, even while still dormant. They prefer to bloom early, but unfortunately, also finish bloom early.

Summer bulbs are very different. They go into the garden later because they do not require chill. Furthermore, many types are sensitive to minor frost if they begin to grow too early in winter. Since they start growth later than spring bulbs, summer bulbs generally bloom later. However, some bloom for extensive seasons. A few summer bulbs bloom from early summer until frost in late autumn.

Dahlia, canna and old fashioned white calla are the more reliable of summer bulbs to plant now. Old fashioned white calla may be rare in nurseries. Smaller, more colorful, but less vigorous callas are more popular. Such summer bulbs are more sustainable than spring bulbs, and can perform for many years. Gladiolus and various lily are spectacular summer bulbs, but bloom once annually.

Incidentally, unlike the spring bulbs, most summer bulbs are actually corms, rhizomes, tubers or tuberous roots.