Jim’s Notebook September 2, 2010
September 2nd, 2010 · by Jim Hole
Hits & Misses: Refreshing mums & tomato blights
Question of the Week: When can I harvest my onions?
Science & Technology: Fuel for thought
For the past few years it’s been a family tradition to head up to Jasper for a little hiking prior to the long weekend in September. We’ve had both cool and warm weather on that last weekend in August, although, historically, it’s always been dry—until this year when our luck ran out. When we began our hike up Whistler Mountain, we were greeted with sunshine. But it gave way to cloud, then showers, then ice pellets and, finally, at 1,500 metres, a good dump of snow that continued all the way to the 2,300 metre summit. Getting soaked and chilled in that flurry reminded me of …cabbage. One of the “joys” of my vegetable farming days was harvesting the last of the cabbage for winter storage. Invariably, that late fall task entailed brushing snow from the cabbages so we could slice the heads from the stems. Trust me, snow-covered mountain rocks and snow-covered cabbage heads look eerily similar. But a 20 acre field of snow-capped cabbage just doesn’t compare to a mountain view.
Hits & Misses
Hit: Refreshing Mums
What do you do when bedding plants begin to fade late in the season? Airlift in a few garden mums. They’re the perfect late-blooming plants for rejuvenating containers or flowerbeds. Garden mums come in a multitude of colours, endure cool weather and require little more than a good regular drink of water to stay in great shape. I always pull out fading annuals and drop in the mums as the calendar turns to September.

Miss: Tomato Blights
Tomatoes don’t like the weather we’ve had; they hate it. Over the past several weeks, many gardeners have seen their tomatoes turn brown before their eyes. The culprit or culprits (as may be the case) are blights that have a penchant for tomatoes. Both early blight and late blight (two similar but distinct plant diseases) can transform green foliage to brown foliage in short order. When these diseases are floating about, all they need to infect susceptible tomato varieties are the right conditions—moderate temperatures and a lot of rain showers—to infect and damage plants. Unfortunately, August provided the perfect environment for these blights, and tomatoes in our region are paying the price. If caught very early, damaged tissue can be pruned out, although that won’t guarantee the blight won’t spread. There is no cure, so plants usually have to be removed. As a preventative measure, avoid overhead watering, whether via a garden hose or Mother Nature. And, yes, I know that’s much easier said than done.
Tomatoes affected by blight.
Question of the Week
When can I harvest my onions?
You can harvest onions as soon they’ve reached a size you like. But if you’re looking to store the mature bulbs, leave them in the ground until the top growth has fallen over and dried. Always ensure that the “necks” are dry, or the bulbs will not store well. To speed up the drying process you can cut the roots. Once dry, cure the onions in a warm (24˚C), dry, well ventilated place for at least a week before putting them into a cool, dry location for winter storage. They’ll last well into the following spring.
Science & Technology
Fuel for thought
Put a cactus in your tank? Researchers are investigating the potential of various agave species as biofuel sources. That’s because agaves use water six times more efficiently than plants such as wheat, and can be grown in poor quality soils. In California, Agave deserti that received just 4.3 cm of rainfall produced 7 dry tonnes per hectare per year. That’s a lot of juice for tequila…er fuel.
Did You Know?
A four-month-old rye plant has over ten thousand kilometres of roots and billions of root hairs.
“Like a welcome summer rain, humor may suddenly cleanse and cool the earth, the air and you.”
–Langston Hughes






