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In A Vase On Monday: Mothers’ Day

Yesterday was my first Mothers’ Day without my mother. I got her roses though. I mean I dug and canned the roses from her rose garden last winter. They live here now. Most were rather shabby and old, and probably should not have been salvaged. Nonetheless, they are all remarkably healthy now, even if only four bloomed so far. These are the same four that I got pictures of earlier, for Six On Saturday two days ago, so are somewhat faded now. Since these are the first blooms on elderly plants that, although healthy, are recovering from brutal transplant, the stems are quite puny. I gingerly set them in one of my mother’s Waterford vases, with nothing else. They would have disintegrated if I had tried to ‘arrange’ them. Instead, I simply left them facing away from each other in four different directions. Even if they had been in better condition, I really do not know much about arranging flowers. I only grow them.

‘Proud Land’ is my favorite of the entire rose garden, and the oldest of the original roses. I planted the first in about 1984, and added two more during the following winter.

‘Heaven on Earth’ is too billowy and pale pink for me, but I got it now anyway. The color was richer earlier.

‘Apricot Candy’ really was apricot colored not too long ago.

‘Julia Childs’ is surprisingly fragrant. It was likely a gift from Filoli, where my mother volunteered.

In A Vase On Monday, which is also known simply as IAVOM, is graciously hosted by Cathy of Rambling in the Garden. Anyone can participate. I did, at least this once. Simply arrange flowers or other material from the garden in a vase, and share pictures of it with commentary and a link back to Rambling in the Garden. Also, leave a comment at Rambling in the Garden with a link back to your post.

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Layer To Propagate Favorite Plants

Ivy takes root as it grows.

Ivy is creepy. It creeps everywhere. As it does so, it extends roots into or onto whatever it creeps over. Not only does it do this to climb, but it also does this to propagate. It literally roots as it goes, to function more as a swarm of countless small plants instead of a single big plant. A bit of well rooted stem may grow independently from the original as a ‘layer’.

Many vines do the same, even if they are normally climbing vines that just happen to fall onto the ground. A few shrubs and trees, especially riparian sorts, are happy to do it also if lower limbs lay onto damp soil. Such a rooted stem is known as a layer because it lays on the ground to root. In a home garden, a layer might root below a layer of mulch or soil. 

In fact, many plants in home gardens are easy to propagate by intentional layering. Many develop roots more reliably if layered than if propagated from cuttings. They grow almost like cuttings, but while attached to the original plants to sustain them. Layering produces only one or a few new plants, unlike cuttings, but for most home gardens, that is enough.

Some plants are easier to layer than others. Pines and most eucalypti are uncooperative to the technique. Rhododendrons, azaleas and camellias layer relatively easily, but may take more than a year to finish. Elms and magnolias are even happier to layer, but rarely retain low stems. Some plants layer best after spring bloom. Others layer through winter.

An intentionally layered stem should be partially buried, with a few inches of stem below the soil, and a few inches of the tip of the stem protruding above the soil. Notching about a third of the way through the underside and applying rooting hormone promotes rooting. Regular watering is necessary through the process, which continues at least until winter. 

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San Francisco iris

Modern hybrids really are more colorful and bloom longer, but those of us who are familiar with the originals still appreciate them.

tonytomeo's avatarTony Tomeo

P80505KThere really is a bearded iris that happens to be named ‘San Francisco’. It is related to ‘Los Angeles’, but not ‘San Jose’. (I really want to find a copy of ‘San Jose’ for my own garden!) Both ‘San Francisco’ and ‘Los Angeles’ are white with a slight blue highlight, and an even slighter reddish edge that is easy to miss. I can not remember which one of the two is whiter than the other, but the whiter one may lack the reddish edge altogether.

The San Francisco iris I remember is something completely different. It is a native west coast iris, Iris douglasiana (or douglasii or any other variation of ‘douglas‘ that any particular botanist happen to prefer) that happens to be endemic to the coastal region of San Mateo County south of San Francisco, and was probably endemic to San Francisco County as well. It would…

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Pine

This is why I am so protective of some of the trees at work, and why I am so hesitant to execute major changes to the landscapes.

tonytomeo's avatarTony Tomeo

P80429Redwood Glen was the ‘camp’ that we all went to in the sixth grade. It was probably our equivalent of what is now known as ‘nature camp’. For most of us, our experience at Redwood Glen was the longest time we had ever been away from our homes and families. We arrived on Monday morning, and returned home on Friday afternoon. It was something that we looked forward to with great anticipation for the few years prior.

While there, we studied nature in a variety of ways. We found animal tracks and made plaster casts of them. We went hiking through a variety of ecosystems, and went on a night hike. We searched for fossils; and I found and still have the most complete fossil of half of a fish. We studied ecology and native flora and fauna. We identified redwoods, Douglas firs, ponderosa pines, bays, live oaks, bigleaf maples…

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Six on Saturday: Roses for Momma

Actually, four of these ‘Six’ roses are ‘from’ rather than ‘for’ Momma. They came from my Mother’s rose garden. I never sent roses to my mother for Mothers’ Day, which is tomorrow, because she had more than I did. Besides, roses from a horticulturist would be rather mundane. Instead, I gave her rooted cuttings of all sorts of odds and ends, such as angels’ trumpet, pink jasmine, forsythia, flowering quince and a minute olive tree. Of course, only angels’ trumpet had yet to bloom. Red Souvine, ‘Roses for Momma’ composer, might have had something to say about that.

1. Double Delight is presently blooming quite abundantly at work. The yellow is normally more whitish. The pink is normally more reddish. We really have no idea what cultivar this is though.

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2. Amber Queen is also unidentifiable, and is also blooming remarkably well in the same small rose garden as Double Delight. I am impressed by how well they perform here, in a bit of shade.

3. Julia Childs resembles Amber Queen up close like this. It was a gift from Filoli. My mother volunteered there after retirement. Actually, a few items in my mother’s garden came from Filoli.

4. Apricot Candy might have been another gift from Filoli. The name is so appropriate for a garden in the Santa Clara Valley. I rather like the simplicity, although the flowers should be fluffier.

5. Heaven on Earth is one that I would not have selected. Yuck. Yet, my mother gave it a prominent situation, but never allowed me to add a most elegant John F. Kennedy rose to the garden!

6. Proud Land was one rose that I agreed on! There are three! They are the only remnants of the original roses that I planted within a few years of 1985. The flowers are typically more billowy.

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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Box Elder

Box elder is the ‘other’ maple.

No other maple is native to so much of North America as the common box elder, Acer negundo. Yet, because of innate structural deficiency and a general lack of pizazz, it is also one of the least popular. The smaller and more adaptable garden varieties are more often grown for their interestingly colorful foliage. ‘Flamingo’ starts out with pink, white and pale green foliage that turns richer green and white by summer. ‘Violaceum’ has smokey purplish new foliage that fades to rich green. ‘Auratum’ has yellowish foliage that fades to chartreuse green. Any stems that try to revert to a more natural shade of green should be removed before they dominate. Unlike other maples that have distinctively palmate leaves, box elder has compound leaves with three or more leaflets each.

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Make Copies Of Favorite Plants

Honeysuckle can layer naturally, and will most certainly layer if a portion of stem is simply buried or weighed down under a rock.

Where they grow wild in riparian environments, box elders, willows and cottonwoods are not as clumsy as they seem to be. As the rivers and creeks that they live so close to erode the soil around them, they often become destabilized and fall. Yet, this is actually part of their plan. If their original roots remain somewhat intact, the limbs and trunks develop new roots where they touch the ground. Eventually, these rooted limbs and trunks develop into new and separate trees.

In home gardens, a similar technique known as ‘layering’ can be employed to propagate one or a few copies of many other plants. Many sprawling vines and ground covers, such as ivy, honeysuckle, blue rug juniper and trailing rosemary, are likely to develop roots where their stems touch the ground anyway. Rooted stems need only to be found, dug and separated as new plants. Shrubbier plants need a bit more help.

Azalea, rhododendron, camellia, holly and just about any plant that has low stems that can be bent downward into the soil can be propagated by layering. Redwood, elm and magnolia do not always have limbs that reach the ground, but any that do would be pleased to cooperate as well. In fact, there are only a few woody plants that do not develop roots by layering, such as some pines and most eucalypti.

A layered stem only needs to be partly buried to develop roots. The tip should protrude from the soil a few inches. A short stem may barely protrude above the soil. A layered stem of a plant that develops adventitious roots very efficiently can be as long as a few feet. A very flexible stem can easily be held down by the weight of the soil that it gets buried with. A more rigid stem may need to be held down with a rock.

Before getting buried, the stem should be cut about a third of the way through to promote development of roots. The cut should be made on the underside so that it stays open when bend downward and buried. A bit or rooting hormone powder applied to the open wound accelerates the process. It works almost like taking a cutting, but without completely separating the cutting from the parent plant right away.

Once buried, a layered stem should be watered regularly until it gets dug while dormant (or mostly dormant) the following winter. By that time, the rooted stem can be dug and pruned from the parent plant, and then planted where desired. Because it takes a few months for enough roots to develop, layering should be done in spring.

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Pinnate Leaves

It is after 11:00 on Tuesday night and I am still working late to get my gardening column finished for tomorrow morning. I do not have time to find an article to recycle that conforms to the Horridculture meme for Wednesday. This must do.

tonytomeo's avatarTony Tomeo

P80428K.JPGThat refers to the pattern of the veins in the leaves. Long before studying horticulture and botany at Cal Poly, my classmates and I learned a bit about horticulture within the contexts of studying ‘nature’. While in the sixth grade, we all went to camp for a week. One of the many projects we did during that time was collecting a few leaves to represent three different vein patterns, and mounting them under clear plastic on a cardboard plaque. The three different patters were, ‘pinnate’, ‘palmate’, and ‘parallel’. I do not remember if we all used the same leaves, but for my plaque, I got a blue gum eucalyptus leaf to represent pinnate veins. Palmate veins were represented by English ivy. Parallel veins were represented by English plantain.

These two blue gum trees are the same trees that provided the leaf with pinnate veins for my plaque. This is not…

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Black Locust

White black locust bloom seems oxymoronic.

The natural ranges of black locust, Robinia pseudoacacia, likely included only the Ozark Mountains, the Ouachita Mountains, and the Appalachian Mountains south of New York. Early American colonists planted it elsewhere before botanists documented its origins. It was notably used for firewood, durable lumber, erosion mitigation, and soil conditioning.

Modern cultivars are less useful for such applications, but are more appropriate for home gardens. Regardless of elegantly lofty form, delightfully finely textured foliage, and richly fragrant white bloom, the species is aggressively invasive and wickedly thorny. Cultivars can bloom pink or rosy pink, lack thorns, and develop more compact and shapely forms.

Bloom resembles that of wisteria, with many small flowers hanging in pendulous trusses. Deciduous foliage, which was absent through winter, appears in conjunction with bloom, but does not obscure it. Individual leaves are pinnately compound, with small leaflets on central rachises (stalks). Most modern cultivars will not get much more than forty feet tall, to make moderate shade.

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Limb Failure Of Spontaneous Nature

Riparian trees notoriously shed limbs spontaneously.

Winter storms sometimes break limbs or topple trees. Such damage is no surprise during winter because that is when almost all windy weather happens here. Early storms during autumn might be more damaging because deciduous trees are less aerodynamic prior to defoliation. Nonetheless, falling trees and limb failure are typically associated with wind.

That is why spontaneous limb failure is such a surprise when it happens, typically during pleasantly mild or warm weather of spring or early summer. It is more likely without wind than with it. Humidity, although atypical here, is a contributing factor. Healthy trees within riparian situations or lawns are more susceptible than distressed trees in drier situations. 

Particular types of trees are more susceptible to spontaneous limb failure as well. Valley oak, coast live oak, sweetgum, carob, some pines and various eucalypti may shed limbs after an unusually rainy winter or an increase of irrigation. Riparian trees, such as willow, cottonwood, box elder and sycamore are notorious for shedding big limbs unexpectedly.

Spontaneous limb failure occurs if limbs are unable to support their own increasing foliar weight. Bloom can add significant weight too. Warmth promotes the vascular activity that increases foliar weight. Humidity and insufficient air circulation inhibit evapotranspiration (evaporation of foliar moisture), which typically compensates for increasing foliar weight.

As the terminology implies, spontaneous limb failure occurs suddenly, and often without warning. It is therefore potentially very dangerous. It is common among limbs that exhibit no prior structural deficiency. Even experienced and educated arborists who are familiar with vulnerable tree species can not identify and mitigate all potentially hazardous limbs. 

Arborists often suggest pruning to limit the weight of trees that are innately susceptible to spontaneous limb failure. However, limbs that are already sagging from their own weight are risky to engage. Most damage occurs in spring and early summer. Fruit trees that are too productive can succumb to the weight of fruit as it ripens through summer or autumn.