By Dave Zeldon and Ely Schweyer

This is a question we hear daily during the spring, summer and, especially, the fall. Unfortunately, many homeowners do not see any adverse changes occurring in their trees until they look dead, or nearly so.

You Might Not Need to Panic Yet

The discolouration and dropping of evergreen needles are a natural phenomenon and the main cause of needle loss in the wild. Evergreen needles, as the name implies, survive for a lengthy period, and in fact usually have a life span of five to seven years on healthy trees, however, they must be shed. The needles first start to die in the central and lower part of the tree, and this change progresses upward over time. You will see spruce trees naturally lose needles as they get older.

   Age is an important factor here in causing needle loss and branch death, however, in landscape plantings of coniferous evergreen trees, pests and disease are likely the major cause of needle loss and dying branches. If there is a sudden fall of a very large number of brown needles and leaves, this signals to us that there is something drastically wrong!

   This can happen as early as a year or two after a tree is planted. This is especially true in Haldimand and Eastern Norfolk County where heavy clay soils predominate. Spruce trees, for example, do not grow well on clay soils.

When You DO Need to Worry

Here are some of the more common problems, apart from natural aging that afflict spruce trees, the probable causes and ways of treating the problem.

☝️Unfortunately, these majestic trees, the most popular evergreen planted on our residential properties, incur many other pest and disease problems not dealt with here.

Symptom: Rusty brown needles that eventually fall.

Likely causes:

1. Internal fungus disease (called Cytospora or white blister canker). This creates cracks in the bark causing resin to drip and leave grey-white dripping streaks on the bark. The fungus also causes open wounds or blisters on tops of branches. These wounds can be greyish white or greyish blue in colour, eventually turning brown and black.

2. Feeding by spider mites which leave fine, poorly formed webs in the needles, especially near the ends of the twigs.

Best treatments:

1. Properly aerate and fertilize tree out to a distance of half its height in all directions, where possible.

2. Pressure wash thoroughly once a month with water only, all needles and branches as high as possible on the tree. Water pressure dislodges spider mites.

Symptom: Chewed up ends of twigs in June.

Likely cause:

Spruce bud worms which develop in the needle cluster that arises from a bud.

Best treatment:

Spray the biological pesticide, BTK (eg. Dipel), onto the entire tree when feeding is first noticed in early spring, to kill the young caterpillars.

Symptom: Black sooty mold covering twigs and needles.

Likely causes:

1. Spruce bud scales, ball-shaped insects, initially light brown in colour but eventually turning black. Often two to five scale balls cluster in one location on the twig; honey dew excretions from scales become infected with sooty mold.

2. An overhanging shade tree such as oak, maple or elm may have heavily infested leaves with aphids whose honey dew secretions become infected with sooty mold.

Best treatment:

1. Pressure wash tree using water only to dislodge young scales (called nymphs) in May and early June while they are in the crawling stage. Scale nymphs fall to the ground where they cease to be a threat to the tree.

2. Spray shade tree in early spring with insecticidal soap to control aphids. The problems of other coniferous evergreens such as pines, firs, cedars and junipers can usually be treated with correct diagnosis, though some diseases are lethal.

We hope these help you troubleshoot common issues often found in evergreen trees! For more information - and evergreens – visit Eising Greenhouse and Garden Centre! 🌲

Fall is the time to plant garlic if you want to harvest them next summer. Why grow your own garlic? Like any vegetable, fresh garlic just tastes great. It’s also very satisfying to plant one little clove and get a whole head of garlic from it. Think of it as a garlic bank: put in a little effort in the Fall, and next summer you will profit from that small investment in spades! 

If you’ve never planted garlic, it’s quite an easy crop to grow. Just follow these seasonal steps to help you get started. Hint: Mid-October to early November is when the majority of the work takes place.

FALL

Choose a location that is in the sunniest area of the garden. Lots of sun will produce large heads of garlic.

Prepare the soil in late summer, or as early in the Fall as possible. Or prepare the day before you plant if you can’t get to it sooner! Amending the soil is an often missed step but it will provide valuable nutrients for your garlic throughout the seasons.

Add organic compost like mushroom or sea compost, composted green waste, aged or composted manure, or a mix of any of these. Variety is best and all are great options. If you’re starting a new, raised bed, mix a ratio of 75% compost with 25% vermiculite to create a nice, light soil for your plants. This mix can also be added on top of the soil of an existing bed, making harvesting easier next summer!

Choose a garlic variety based on the flavour and size you like. There is softneck or hardneck garlic, but hardneck is recommended for growing in Canada. Also, hardneck varieties produce scapes which are a bonus crop - you can read more about that below. Red Russian, Music and Chesnock are just a few of the popular varieties grown in Ontario.

Separate the garlic cloves, or teeth, from the heads. As you’re breaking down the heads of garlic, it’s important to choose the largest cloves to plant. Starting with large cloves will increase your chances of growing large heads of garlic. Set aside any small cloves to cook with.

Planting! Sometime between early October to mid-November is a good range to get your garlic in the ground in Norfolk County. Basically, 4 to 6 weeks before the ground is frozen.

Here’s how to get your garlic in the ground!

1. When it comes to spacing, there are two options.  

Using a dibber or a hand trowel, create 3 to 4” deep holes in one of the following patterns: 

                     a) Make holes that are approximately 6” apart and in rows that are 6” apart. 

                     b) Make holes that are approximately 7” apart and in rows that are 7” apart. Then, go halfway between each row and make an offset row. This method is best if you don’t have a lot of space and will not impact the growth of the garlic.

     2. Place a handful of worm castings or organic 4:4:4 fertilizer in each hole and mix into the soil a bit.

     3. Place ONE clove in each hole, with the pointy end facing up and the flat end down.

     4. Backfill with surrounding soil so that each clove is covered 2-3”. This acts as protection during the cold winter months.

     5. Top with leaf mulch, leaves, or straw, and water in your garlic if there is no rain in the forecast for several days.

SPRING

This is the time to check on your garlic and give it a little more nutrition.

Look for signs of first growth in February or March, depending on how warm the weather is. When you see 3”- 4” of growth, remove the mulch from around each plant, or from the bed, and add it to the compost pile.

Add nutrients by amending the soil with 1 tablespoon of 4:4:4 organic fertilizer per square foot of the garden, or add a 1”- 2” layer of fresh compost. 

Water deeply from now on when the soil dries out. And that’s it! Your garlic is well set up to go into a BIG growth cycle.

SUMMER

Remove the scapes! Around mid-June look for the top of the stem of each plant to curl around forming what’s referred to as a “scape”. These curls, or scapes NEED to be removed so that the energy from the plant goes into growing the bulb, not into growing the seed head that is part of the curly scape. One full loop is a good time to cut or snap off the scape just above the top foliage.

All of the growth in the bulb happens once you remove the scape!

Here’s the bonus - garlic scapes are delicious! Chop them up and add them to soups, stews or anything you’re grilling. They also make excellent pesto!

Water and check your garlic for any pests throughout the growing season, just as you would with any other plants.

Harvest! Sometime in July, you will start to notice that the bottom leaves of your plant are dying. Don’t worry! The leaves on the plant correspond with the protective layers forming around the outside of your bulb, and they’re getting ready for harvest.

Around mid-July, 4 or 5 of the bottom leaves will be dead and this is your sign that it’s time to harvest your bulbs. 

• Stop watering your garlic 4 to 5 days before harvesting.
• Use a pitchfork or shovel to loosen the soil, keeping well away from each plant so that you don’t slice through the garlic heads.
• Gently pull up each bulb and shake off any soil hanging on to the roots. Resist the urge to wash the bulbs as moisture at this stage will promote mould or rot!

Cure your garlic harvest by hanging it in a cool, dry place that’s out of the sun and has good airflow for 2 to 3 weeks. You may need to use a fan for this step. 

Once cured, trim off the stems leaving 1-2” and the roots, and store in a dark, cool and dry spot in the house. Well-cured and stored garlic can last until sometime between December and February… unless you’re cooking, canning, and freezing with it and use most of it up! But don’t forget to save the biggest cloves to plant again in the Fall!