Why do the red maple leaves look brown? Frost Damage to Spring Plants and Trees

Just a few weeks ago the heated issue was the potential impact of a very warm spring on local plants and trees.  Then came a serious cold snap and the answer was apparent--it's not the warm weather that hurts, 'tis the freezing temps that may follow.  Here in the mitten we're fond of saying "If ya don't like the weather in Michigan, just wait an hour."  This time the garden did not escape unscathed. Luckily, the damage is only cosmetic. 

The red Japanese Maple looked like it had been dusted with sand.  Upon closer inspection, the top leaves had turned a pale brown due to the frigid temps of last week.  By the weekend, most of the burned leaves had fallen off.  The top canopy was hit the hardest.  The maple may need a comb-over this season. The leaves of the hydrangea have a crispy look too. 

The only serious casulaties were two small tomato plants left out in the cold.  Warm weather annuals simply can't tolerate even short bursts of cold. Impatiens and tender herbs such as sweet basil will shrivel when the thermometer hovers at freezing, even overnight. 

Short term damage to foliage is exactly that.  The core of the plant, the stems and root system remain intact and functioning.  Similar to a sunburn, but aloe doesn't help--only time.

The bad news is the damage will remain for the season, but it's minimal.  Smaller plants can be gently pruned back or the burnt leaves plucked. Next year, weather permitting, the foliage will survive unscathed.  There's always next year.  No matter the appearance, do not cut back the tree. 
The vagrancies of nature are not always predictable nor pretty.  Today it will be eighty five and sunny. 

Bundle up!

More Articles of Interest:

Will My Plants Survive this Drought?

Shrubbery Flubbery -- How to Avoid Winter Damage to Shrubs

 Hey! Look What Survived the Winter in my Garden!

When To Plant Flowers in Michigan?

When to plant annuals in Michigan?Happy Mother's Day!  Here in southeast Michigan, the safe bet is to wait until the middle of May to plant warm weather annuals like petunias, impatiens and geraniums.  Otherwise a sudden cold snap can seriously harm these tender plants, especially in the early stages of growth.  A family tradition is to donate a few hours towards planting annuals each Mother's Day.  It began with youthful scrawled coupons in various crayola colors. They were always redeemed.  It's a gift that continues to give throughout the growing season.

Sitting in "The Big House" in Ann Arbor along with forty thousand other  family members, and eleven thousand of the brightest and best tender seedlings, the freezing cold had no impact.  The warmth of emotion and communal pride in our young upstarts warded off the icy wind.  The saplings are ready to transplant.  The freezing rain held off until we hustled back to the parking lot. Timing is everything, in life, as in the garden.

Cold hardy annuals like pansies and violas can be planted safely in early to mid April depending on the weather.  This warm winter, many survived and are thriving. 

For timing, consider the area of your property where you wish to plant.  Sunnier areas can accept annuals earlier than cooler shaded spots.  Look at the perennials in your garden.  Some hosta still look like asparagus poking out of the ground, while in otherspots they are in full circular bloom.  Plant in the latter, sooner.

Don't be seduced  by the early appearance of flats of sunny impatiens at big box stores. It's tempting, but those colorful darlings spent their infancy in a warm greenhouse.  Remember that annuals are just tropicals in the wrong neighborhood. Popping them into the cold ground can cause a significant shock.  More dangerous are the heavy rains we often experience here in Zones 6a to b throughout April and May.  Those tiny upstarts can't swim yet, so sitting in a pool of accumulated precipitation just isn't condusive to good growth.

Besides, those early flats are typically overpriced.  The best deals begin when the Michigan grown flats appear in May at Eastern Market (go after 2:00 pm for the best deals) or some of the local grower's greenhouse.  Locally grown plants have a greater likelihood of thriving.  Newer non-native favorites like Angelonia and Cleome should wait untilmid June. 

Block's Marketstand and Greenhouse is a personal favorite, but each gardener has their own. Block's opens when the plants are good and ready, and not a moment before.  A call to the greenhouse in mid April results in a recording informing the caller that "We will open around the end of April."  It's worth the wait.  The flowers are healthy, the selection endless, and the prices low.

Even if the plants are local, it's still best to "harden" them off.  This takes only  a couple days, and involves no more than setting them out during the daylight hours, and bringing them in at dusk. They can sit in the garage at night. 

No need to tuck them in.

Happy planting!

GO BLUE!

Related Articles:

Impatiens Disease -- Trouble in the Landscape

Container Gardens -- Pots on the Spot!

Why Do the Red Maple Leaves Look Brown? Frost Damage to Spring Plants

Hey! Look what survived the winter in my garden!

There's the cutest pot of johnny jump ups outside the shed. In the morning sun they turn their bright shining faces outward--joyful harbingers of spring!   But don't let their adorable looks fool you.  Those perky little violas are tougher than steel nails.  Where brawnier annuals shriveled after the first or second frost, these tiny plants hung on tight through our mildly chilly winter, making a rare but strong comeback in March.

Reblooming in pots is even more impressive as the soil temperature is lower and freeze and thaw more prominent.  This 'twas the winter of little snow and mininal arctic blasts.  When this happens, plants that are marginally hardy, those which might survive as perennials a few hundred miles south, come back with a vengeance--at least until chilly winter returns.

Leaving the herb pot out all winter paid off.  Oregano, parsley and chives have all rebloomed.  Sweet tender basil was the only casualty. 



A full ring of dusty miller encircles a tree.  A border of Sweet William blooms profusely.  There's even a lumpy cactus that has survived two winters in a south facing windowbox.  It's not too attractive and the tiny needles often penetrate garden gloves, but the bragging rights outweigh the discomfort.  Cactus overwintering in Michigan?

Some marginal survivors become leggy like the pansies along the driveway. Clipping stringy extensions back to the fullest point produced bright yellow blooms in only a few days.

Garlic Mustard

What else survived with a vengeance this temperate winter?  The hardiest of the hardy--weeds!  weeds! weeds!  Without encouragement, the invasive garlic mustard of last fall is phat and happy.  Dandelions are  sprouting early  yellow flowers.  This will be a bumper crop of trouble  unless early action is taken. Garlic mustard pulls out fairly easily. Dandelions are tap rooted and must be dug out with a sharp pointed spade. Other green methods like boiling water may work but are kinda dangerous.



Primrose Lane

 Early intervention reduces the need for unhealthy chemical use later.

Weed killers cause toxic phosphate runoff into lakes and streams.  Much of our area is watershed, thus the individual homeowner's impact on the enviroment is exponentially higher than communities on drier flatter ground. 

Michigan is never the same place twice, so enjoy the minor aberations of nature, and start pullin' those weeds!



Peeking Pansies