Some Good Reasons To Plant Pots For Spring

Our spring has been an exasperatingly wintry sort of gray and cold. April has been a last of the winter month. But today April 30th, we have blue skies. That blue is a giant step towards spring. Every gardener in my zone is on that plane that promises to leave our wretched April weather behind. The sun drenching my landscape with warmth and promise-that promise could not be more welcome. Was this worst April of my gardening lifetime? Yes.

No one is happy looking at empty pots. It has been too cold to plant anything except the most cold tolerant plants. Can you hear me sighing?  Not that my memory of past Aprils mean much. I know that the weather cycles in years vastly bigger than my time on this earth. The theys who keep records say this is the coldest April we have had for 134 years. We’ve all been living that scene. Sitting out a few nights ago after work made me wish I had a coat like Milo’s. Today we are slated to hit 80 degrees.

Today we will plant the last of our spring container plantings. Do I plan to post pictures of what we have planted this spring? No. It will take weeks for what we have planted to grow on and look like something. Spring container plantings are at their most beautiful the first of June. Perfect timing, in my estimation. My spring pots coming in to their own later in May prevents me from rushing to plant too early for summer. Nature, and gardeners, abhor a vacuum. The sight of bare dirt is instantly followed by the urge to plant. The urge to plant this year is especially strong. To follow are pictures of some of my favorite spring container plantings. Most of them were taken in late May.

pansies and violas

variegated lavender

orange osteos, heuchera, and orange pansies

curly pussy willow and sweet peas

spring pots featuring pansies, violas, dill, and fan willow

Marguerites, pansies, violas and cream alyssum in a basket

Bok Choy, osteospermum, mini marguerites and alyssum

White osteospermum, chrysanthemum paludosum “Snowland”, yellow petunias and blue salvia


carexviolas and angelina

lettuce and alyssum in a basalt pan

Variegated lavender, cream alyssum and strawberries in mid AprilThat mid April at the end of May-striking.

Planting Containers For Spring

Our local newspaper recently confirmed what all of the gardeners in my area already knew. One would have to go back 134 years to find an April as cold as the one we have just lived through. Who knows what gardeners did in 1887 given their blisteringly cold April. I am cautiously optimistic that better weather is on the way,  even though it is barely 50 degrees today. I have had clients tell me that we won’t have any spring. That summer is just about here. Don’t believe it. We always have a spring. The March and April of it has just been exceptionally cold. May is a spring month as well, despite those who insist on planting summer annuals and vegetables before the soil is warm enough for them.  Anyone who treats May as a summer month is bound for some disappointment. We have been planting spring containers for a few weeks now. We have relied quite a bit on pansies and violas, as we have a grower who starts them the previous summer, and winters them in a cold greenhouse.We have planted some annual phlox, and I took a chance on some dwarf white fuchsia, rosemary, lavender and lettuce. These plants have been hothouse grown, so placing them outdoors abruptly can result in leaf damage. What it has been too chilly for is a long list.

The buds on the trees are swelling, but we are still leafless. The landscape looks groggy. Off color. My magnolia stellata has flower buds barely breaking and showing white. I am sure many of those buds will never open.The hellebores are thinking about it. Not a peep out of much else, but for the early flowering spring bulbs. The only perennial plant in my garden who has dared to venture forth is Alchemilla-lady’s mantle. Those new leaves are hugging the ground. As they should! But this daffodil mix pansy is as bright and cheery as can be. Though they are diminutive in size, pansies can provide a vivid preview of the color to come. Plant a few, or plant a truckload, the effect is the same. A little or a lot of color can energize  gardener. Daffodils are just beginning to bloom, and the tulips will be a good while yet. This means the timing for an appearance from pansies and violas is just right.

It is a lot to ask of a plant, to be ready to grow and bloom ahead of time. Our pansies have been fine with temperatures as low as 22 degrees.  For this project we loaded up and left them in the truck, which was parked in our landscape building, for 3 days. That protected them from our recent our ice and sleet storm. But I can report that those plants that endured that nasty weather outdoors look just fine today. How I welcome their forbearance. I am always amused to hear a plant described as shade loving. They are in fact shade tolerant. Lots of seasonal plants can tolerate chilly temperatures, but few persevere in really cold weather like the pansies.

Fresh cut pussy willow is a mainstay of our spring pots. The catkins are a glossy and furry gray. Once they are cut, they will hold that moment  as they dry. Pussy willow stems indoors, in water, will produce pollen, and many stems eventually leaf out. Their behavior in this regard is a great example of how routine and powerful the will to live can be. I especially enjoy how effortlessly they adapt to a second life in a container.

The pansies are small and short in April. A another month, they will be overflowing these boxes. But for now, a tall centerpiece of preserved eucalyptus and faux stems provide them a forum from which to speak up. There are those transitional times in the year when a gardener has the option to represent the sentiment of the season generously.  In a very short time, there will be breaking news from all of the plants in the landscape. Right now, spring containers have no competition.

Color plays a big part in any seasonal planting.  Colors placed side by side that are closely related make for a subtle expression.  Colors that strongly contrast in both hue and value make for more drama.

I do like color mixes that are not entirely predictable. No gardener needs a computer generated plan of action. I like that odd color out. I like color mixes that are imperfect. I like efforts in the garden that are unpredictable. The best voice is one’s own garden is one’s own voice. Trust that. Whatever I do in my garden, landscape, or containers, I always like when I can see that my choices are based on a relationship between my hands and the materials.

I am a professional designer. I do take pains to discuss with my clients about what they would like to see.  There is a relationship that needs to be honored. I do not expect them to direct me. I encourage them to express to me what is important to them in style, shape and color and affect. I try to interpret that.

This client chose a sunny and contrasting color palette for her spring planting. I admire that gesture. She is as tired of our long winter as I am.

Sooner or later she will see the lettuce at the center of these boxes. The spring garden is full of surprises, is it not?

Who Can Take It?

Who can take it-this vile April weather? Mother Nature has been lavish with the bitter cold, snow, wind non-stop since last November. Today, we have significant icing on her cake. Everything outdoors is coated with it. 340,000 people in Michigan have no power. It is even too icy to walk out and take pictures.  I am not a good sport about being forced to stare out the window the middle of April. The relentlessness of it all makes me want to fall to the ground and black out. This may sound dramatic, as it should. Winter needs to high tail it out of here.

Buck has had enough of my ice storm company today, so he scraped a path from the back door to the steps-just far enough so I could take this picture. He decided a trip to the grocery store through the icy slush was better than watching me wring my hands. We will not be enjoying a spring evening here later. Ha! You would think that after as many springs as I have seen, I could muster a little patience and fortitude. Apparently not. I am a gardener, and I want to get out there. Don’t you?

There are many plants in the garden that are not particularly fazed by by leftover winter weather as much as I am. Snow drops are aptly named. From the BBC website, “Their leaves have specially hardened tips to help them break through frozen soil and their sap contains a form of antifreeze to prevent ice crystals forming. On very cold mornings, clumps will flop down as the water is ‘frozen’ inside the cells, but soon perk up again once temperatures rise and the sap can flow again.” Cold weather triggers the transformation of stored starch into sugar in the leaves of the snowdrops. Just like salt on a freezing roadway, the sugar in the water inside snowdrop cells lowers the temperature at which the water in those cells will freeze.  Water in plant cells that freezes rock solid destroys those cells. The snowdrop sugary antifreeze helps protect these early harbingers of spring. Snowdrops? They have a DNA that insures the survival of their species.  Freezing temperatures rarely bother the early spring bulbs, provided the freeze is of short duration. The DNA of early blooming spring bulbs meeting a delayed Michigan spring-show time.

The small spring flowering bulbs have another survival strategy. Many of them thrive in open to medium shade, as the ability to bloom and set seed before the leaves on the trees get to full size means makes for a more successful colony. These spring bulbs are also able to multiply via the production of offsets, which eventually grow into full sized bulbs. As a group, they seem to tolerate tolerate very chilly weather. Once in bloom, their worst enemy is weather that is too warm.

Spring flowering bulbs will send up leaf shoots early, if there is a spell of warm winter weather. If the weather cools back down, their foliage may or may not be damaged by frost. The foliage comes up first. At this stage, the flowers on these daffodils are still safely ensconced below ground. Once the season has shifted to spring, the flower buds will emerge.  Once the spring flowering bulbs are in bloom, cool nights are essential to the longevity of the flowers. They will fade fast in hot weather. In love with the idea of a spring garden? Consider spring flowering bulbs, and hope for cool, and not crazy, weather.

Hellebores are incredibly cold tolerant. I have seen flowering stalks laid flat by overnight temperatures in the low 20’s. Once the day warms up, they snap right back as if the insult had never happened. Extraordinary, this. It is fortunate that it is too icy for me to go and take a look at them. I would just be fretting over nothing. This plant shrugs off bad weather. The perennial hellebore is a mainstay of an early spring garden in Michigan. None of my hellebores are in bloom yet. But they will be.

My crocus had just come in to full bloom day before yesterday. The flower spikes emerged prior to our last snow. That late season squall did not seem to bother them a bit. The flowers stay closed in cloudy or stormy weather, and and open in sunny weather.  This is an adaptation that serves them well. Freezing rain pummeling an open crocus flower would turn it to mush.

My crocus are quite happy in a bed dominated by Baltic ivy. I never notice their foliage ripening. Crocus are beautiful grown in grass, but my grass is not fit for company this time of year. I like them much better in groundcover, or a perennial bed.

Pansies and violas are quite cold tolerant, provided they have had a chance to harden off with measured exposure to cold weather. All of ours are cold grown the previous fall, and wintered over in a greenhouse without heat. They are ready to go in the garden immediately. Like other spring blooming plants, they can tolerate very cold temperatures as long as those super cold temperatures don’t last too long. I have seen them bounce back from a 19 degree night. What they do not like is wind.  It makes sense that these big flat faced flowers would not fare well in a gale.

Detroit Garden Works is putting up a 30 foot wide by 60 foot long high gothic tunnel house this coming week. Hooray. At long last we won’t have to haul tender plants in and out of the garage. We have been covering our pansies at night for several weeks, with a double thickness of row cover, or frost cloth.  This very lightweight non woven fabric can keep the temperature underneath 5 to 8 degrees warmer than the air temperature. 5to 8 degrees can be a game changer. We zip tie bamboo stakes to our plant tables, stretch the cloth tight, and rubber band it to the tops of the stakes. We further zip tie the fabric at the bottom to the bottom rail of the table. That fabric can damage plants if it is able to inflate and deflate on a windy night. Every table looks like a neatly made bed. I am over making beds. I favor a house under which we can grow and sustain great plants.  Our tunnel house will be the perfect thing to protect our plants from all sorts of bad weather. A shade cloth over it will help to maintain a proper moisture level in the heat of the summer. Our grower Karen is happy about the house. Me too.

But sooner or later the weather will turn to spring. I am hoping it will be a long and temperate season. I cannot wait for all of the early season plants to arrive. The annual phlox, violas, angelina, and alyssum surround a rosemary in this spring container planting makes me long for better weather.

This picture of a trio of spring containers was taken a few years ago on May 31. Think of it. If spring lasts until the first of June, we have a lot of springtime ahead of us.


A Pruning Strategy

The best time to prune deciduous shrubs is whenever you have the time available to prune. But no doubt some pruning dates are better than others. Late March is the perfect time time in my zone, provided the ground is dry enough be walked on. The bare branches make it easy to spot what is dead or weak. Or which cuts would result in a better looking or more graceful shape. In general, the shag haircut theory of pruning promotes good shrub health. Big at the bottom, and narrower at the top. Pruning such that no two branches are the same height or forced to  occupy the same space helps to insure that every bud ready to leaf out will have its own light and air space. A place to grow without interference is an ideal place for a branch to be. I like to leave the branches near the ground long, and the branches on the top shorter. Visualizing what has to be cut back on the top so the lower branches get the light they need will result in a shrub that is green and growing from top to bottom. If you think the Limelight hydrangeas above do not look like I took my own advice, you are right.

There is a story behind these leggy Limelights.  Planted as a 5 plant by 5 plant block of 25 some 12 years ago, they had overgrown their space. The lesson here? A shrub that will grow 6 feet tall by 6 feet wide probably will top out at 8′ by 8′ left to its own devices. Keeping a plant smaller than its genetically determined size is, over time, a losing battle. My 25 plants had become a single organism. Removing any of them from the mix would expose a not so lovely look at a dark and bare interior. It was time to take out the outer front and side rows. Once I reduced the size of the block to a four plant by 4 plant block, I could see what I had left over was a mass of hydrangeas on 3′ tall bare stalks. As in, a block of multi-trunked hydrangeas on standard.

Of course these hydrangeas had gotten leggy in the interior. I am sure no light reached the ground during the summer. The outside rows has been pruned to facilitate growth from top to bottom. The interior shrubs has been pruned to encourage growth on the tops. All very predictable, this. Last spring I planted Little Lime hydrangeas in from of those Limelight legs, thinking this shorter version would create a coverup.

That strategy left more that a little to be desired. Little Lime is by no means a smaller growing version of Limelight. The flowers are a different shape and color. I was not crazy about the two plants side by side. Hydrangea Bobo might have been a better choice. That said, I knew my only real option with the limelights was to take a renovation strategy. Hard pruning old hydrangeas hard is only shocking if you do not take into account how fast and much they grow between April and the late July bloom time. A single branch may grow 3 or 4 feet in one season.

This is a radical and grim look, but I suspect they will be full of flowers by the beginning of August. How so? The renovation plan calls for a second pruning in June. I am not interested in long single branches with few and hugely ungainly flowers. Cutting back a long branch midway to the bloom time will result in side branching at the cut. This may result in a delayed flowering, but there will be flowers nonetheless. Next year they will regain their fulsome look.

Hydrangeas respond much more quickly to renovation pruning than other less vigorous shrubs. It won’t be long before they start growing out of this.

Knowing the best time to prune doesn’t necessarily result in action. I should have pruned these hydrangeas harder last spring, when the extra rows of plants came out. If you are like me, what I need to do in the garden routinely gets away from me. How indulgent hydrangeas are of less than stellar care is just one of the reasons to like them. Pruning times depend on whether they bloom on new or old wood. Since the Limelights bloom on new, or the current season’s growth, no matter how much or how little you prune, you are not removing flower buds. Just buds which will become leaves. So prune away.

 Pruning is a paradox. We sometimes prune back shrubs to limit their size, not realizing that a pruning cut, from a shrub’s point of view, is a call to grow. To branch out. A single pruning cut on a large sized branch results in lots of buds breaking in every direction below that cut. This late winter photograph of a hedge in my neighborhood tells the story. A hedge of substantial size was cut back for a number of years-at the height this gardener could reach. The result was lots of branching at the top, which eventually shaded out the branches at the bottom. Once the hedge became too tall to prune without a good sized ladder, the pruning stopped. The result is a rather interesting mix of bare sticks at the bottom,  dense branching at the mid level, and long unbranched growth at the top. Add to that mix, some weed trees that got a foothold in the hedge, and have grown to a large size. In this location, a very tall vase shaped hedge is probably a good idea. The traffic on both sides can come in and out the driveways under the umbrella shaped part of the hedge. I will be interested to see the summer look.To prune or not to prune-now is a good time to decide.