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Love Is In The Air

Daffodils

One of my favorite classes when I attended Cal Poly San Luis Obispo was Plant Taxonomy. On the surface the subject sounds a little dry but the professor was all about plant reproduction which is quite exciting and more varied than you think. So with Valentine?s Day upon us here are some interesting facts about how plants get together and how you can help.

Red flowering quince

If you’re like me you’ve caught a case of pre-spring fever. How can we help it when the flowering plums are covered with hundreds of blossoms, the saucer magnolia flowers are already open, the flowering quince are in full bloom and every acacia in the county is blooming. It’s fascinating to mark time with events in the botanic world. There’s even a word for it- Phenology. Websites like USA National Phenology Network at http://www.usanpn.org/ offer lots of information on the subject.

Phenology is the study of plant and animal life cycle events and how these are influenced by seasonal variations in climate. When do they occur each year? Phenology is a real science that has many applications. In farming and gardening, phenology is used chiefly for planting times and pest control. Certain plants give a cue, by blooming or leafing out, that it’s time for certain activities, such as sowing particular crops or insect emergence and pest control. Often the common denominator is the temperature.

Indicator plants are often used to look for a particular pest and manage it in its most vulnerable stages. They can also be used to time the planting of vegetables, apply fertilizer, prune and so on.

Here are some common garden plants and what they indicate:

When daffodils begin to bloom, sow peas.
When dandelions bloom, plant spinach, beets and carrots.
When lilac leaves are the size of a mouse’s ear, sow peas, lettuce and other cool-weather crops.
When lilacs are in full bloom, plant beans.
Once lilacs have faded, plants squash and cucumbers.
When apple trees shed their petals, sow corn.
When dogwoods are in full bloom, plant tomatoes, peppers and early corn.
When bearded iris are in bloom, plant peppers and eggplants.
When locust and spirea bloom, plant zinnia and marigolds.
When forsythia and crocus bloom, crabgrass is germinating. When this happens the soil temperature at a depth of 4″ is 55 degrees. Treat with an organic pre-emergent.
When crocus bloom, prune roses and feed your lawn.
Mexican bean beetle larvae appear when foxglove flowers open.

Magnolia soulangeana blooming at Filoli Garden

Record your own observations at https://budburst.org/ to start a data base for our area. Another great site is National Sustainable Agriculture Information Service at https://attra/ncat.org/ Sites like these can also help you design orchards for pollination and ripening sequence, design for bee forage plantings, design perennial flower beds and wildflower plantings as well as plantings to attract beneficial insects and enhance natural biological control. How cool is that?

But back to plant reproduction. Mosses reproduce from male and female mosses which produce spores. Conifers produce two type of cones on the same tree. Wind blows the pollen to another cone which combine to make a baby conifer which lives in a seed inside the cone.

Blireiana flowering plum

Then there are the most advanced plants – the flowering plants. Some flowering plants have both male and female flowers. They are monoecious meaning ?single house?. Dioecious plants have male flowers on one plant and female flowers on another. Plants that rely on flowers for reproduction are very dependent on outside help such as insects and animals which is where we come in. Be a citizen scientist in your own backyard.

azaleas and camellias, birds, February gardening tips, February in the garden

The February Garden

Just one of my my many Merriam’s chipmunks

The battle is on. I?ve gotten new bird feeders in an effort to thwart the squirrels. Hopefully, I?ve slowed them down. The chipmunks are so cute I?ve just given them free range. The suet feeders attract beautiful Townsend warblers daily in addition to pygmy nuthatches, chickadees, juncos, purple finches and lesser goldfinches. Did you know that lesser goldfinches are perfect mimics and can belt out the songs of 15 different birds in succession? Amazing.

banana slug

I have an Autumnalis flowering cherry that?s in full bloom again for the third time in a year. I love this tree. I?ve had to up my banana slug relocation program efforts during this moist weather. They are scavengers feeding on detritus and small dead insects on the forest floor so I?m sure they are happy when I relocate them to other parts of my property. Banana slugs reproduce year round. They live up to 7 years and move over 6 inches per minute which seems slow until you relocate one and within a short time it?s back on the patio.

Flowering maple outside my backdoor.

The hummingbirds are happy with the flowering maples (Abutilon) that bloom nearly year round plus I have several nectar feeders to provide food until the flowers in the garden start to bloom. I?m waiting patiently for the buds on my pink flowering currant to start showing color. They?re still pretty small at this stage but I?ve assured my hummingbird population that soon they will have long clusters of nectar-rich flowers to visit. When I was out pruning last week I didn?t touch this plant otherwise I?d have cut off all those potential flower clusters loaded with nectar. This is what I did do in my garden.

The mild-ish winter, so far at least, has encouraged many of my plants, normally still dormant at this time of year, to start growing for the season. What?s a gardener to do when the roses, fuchsias, oakleaf hydrangeas and many other plants aren?t even dormant?

Cut back woody shrubs to stimulate lush new growth. Trim plants like Mexican bush sage and artemisia to within a few inches of the ground. Don’t use this approach on lavender or ceanothus, though. Lightly prune those after blooming later in the season and don’t cut back to bare wood inside the plant.

Prune fuchsias back by a third and remove dead, crossing branches and interior twiggy growth. My fuchsias were starting to grow and bloom already so this was hard for me to do but because fuchsias bloom on new wood it was necessary. Container fuchsias can be cut back almost to the pot rim. Do this right away if you haven?t already done so.

My hydrangeas in back. I might have gone overboard that winter with the soil acidifier.

Cut back hydrangeas stems that bloomed last year and apply a soil acidifier if you want the flowers blue. Although aluminum sulfate is the traditional favorite for quickly acidifying soil it?s not as kind to beneficial soil microorganisms. Coffee grounds, pine needles, peat moss and cottonseed meal are better for your soil.

Don’t prune spring flowering shrubs like lilac, weigela and spirea or flowering trees such as cherry, plum and crabapple now. These and evergreens like rhododendrons, azaleas and camellias should be pruned after they flower. You can cut some branches while they are blooming to bring into the house for bouquets.

Wait to prune back perennials that may have their new foliage damaged in a late frost. Same goes for shrubs that might have gotten hit by frost. That damaged foliage can protect the plant from further frost damage. Mid-March is the estimated date of hard frost in our area or at least it used to be. We gardeners are always betting Mother Nature will go our way and our efforts will not have gone in vain.

Prune fruit, nut, shade trees and deciduous vines like clematis.

Cut back ornamental grasses. I?m pruning California fuchsia, salvia ?Bee?s Bliss? and hummingbird sage now. They look okay now but I want the encourage new, compact growth.

So that?s what?s happening in my world. How about yours?

pruning roses, roses

Roses in the Garden- Pruning Tips

This beautiful bouquet of mixed roses could be yours, too, if you prune now.

Last fall I designed a garden for some friends after they had a new septic system installed. Little was left of the old garden after the bulldozer left. On Susan and Ken?s wish was a new dogwood, a designated space to grow tomatoes, grasses and a cutting garden. When bare root rose season rolled around Susan got her wish and bought several in her favorite colors: purple, lavender and mauve. They are strongly scented and disease resistant. If you have room for a few more roses now?s the time to get yours in bare root.

And if you haven?t already pruned your roses it?s time to do that too. Here are some tips.

Strike It Rich

Roses are super forgiving so don?t be intimidated by all those rules. Just ask my friend, who shall remain nameless but writes the food column for this paper. Her roses are spectacular.

It?s best to prune your roses before they start leafing out or some of their energy will be wasted. If yours have not dropped all their leaves, pull off old leaves after pruning to prevent the spread of fungal diseases.

Cabbage roses with baby’s breath.

Most of us want our rose bushes to produce lots of roses on a compact shrub and not just a few exhibition size blooms so prune your shrubs moderately. The goal is to keep the center of the plant open for good air circulation aiming for a vase-shaped bush with an open center. Cut out canes that cross, saving the better of the two, prune spindly and diseased stems and dead wood. Also prune canes that appear weak or broken. Healthy canes appear green or reddish while old and dying canes are brown. Cut back the remaining stems by about third. When pruning, cut canes at a 45-degree angle just above an outward facing leaf bud or a swelling on the cane. Slant the cut away from the bud to encourage growth outward. Clean pruners afterward to prevent the spread of disease and keep your pruners sharp to make clean cuts.

Same goes for climbing roses. Cut out extra stems if there are too many and also cut back long established canes to the place where they are slightly thicker than a pencil. Then cut each side stem down to several inches. This will cause the cane to flower along its complete length for a beautiful spring display.

Heirlooms roses such as David Austin, other old antique garden roses, and floribunda roses require less pruning because their open look is part of their charm. Keep this in mind and prune lightly. Old garden roses that bloom once in the spring should be pruned after flowering.

If you have a huge climber de-leafing might not be possible and spraying with fungicide may be your only option if you?ve had disease problems in the past. Rake up the debris beneath the plant and discard to eliminate overwintering fungus spores. It’s a good idea to spray the bare plant, coating the trunk, branches and twigs and the surrounding soil with a combination organic horticultural oil to smother overwintering insect eggs and a dormant spray like lime-sulfur or copper soap to kill fungus spores. If you usually only have problems with black spot you can use a mixture of 1 teaspoon baking soda with a few drops of light horticultural oil in 1 quart water and spray every 7 to 10 days during the spring.

Pruning intimidates some gardeners but when you understand the reasons for making the cuts pruning becomes less daunting. The reasons to prune are for health, appearance and to control size.

Hot Cocoa

Prune your roses throughout the growing season, too. Deadheading or cutting off spent flowers encourages plants to re-bloom. Every time you cut a rose bloom to bring it indoors or deadhead a fading rose, prune the stem down to shape the plant at the same time. Prune to a spot that has at least 5 leaflets. Roses grow from the point where they are cut so consider the overall shape of the plant as you snip.

Don’t worry whether you’re pruning job is perfect. Roses are super forgiving and you can always trim them up again later.

By the way, my friend Susan ended up with a Twilight Zone (dark purple), a Distant Drums (bronze/lavender), an Angel Face (another lavender) and two Mr. Lincoln’s (classic red) which are Ken?s favorite. The Barbara Streisand, which was to be another lavender, wasn?t available.

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