Early spring sowing is a topic that causes many gardeners an inordinate amount of stress and confusion. There are 2 primary concerns, as I see it. The 1st concern is that if you sow seeds too early they will die due to snow, cold, frost or all of the above. The 2nd concern is that if you sow too late the vegetables won’t mature before they are killed by…well…snow, cold and frost.
Having grown up in the market garden business, I’ll share what our philosophy and strategy was for early seeding in April:
• A few acres of frost tolerant crops were sown as soon as we could till the soil in April.
• If the soil was too wet, we would wait until we could drive the tractor on it without leaving ruts.
• Once the soil was dry and regardless of the air temperature (0°C or 20°C) we would plant a few acres of cool weather crops such as: cabbage, cauliflower, broccoli, Brussels sprout, onions, parsnips, peas, Kohlrabi, rutabaga, beets, spinach, Swiss chard and even a few potatoes.
• After that initial planting we would sow 2nd, 3rd, 4th, and 5th rounds of these vegetables so that we had a continuous supply throughout the year.
And while it may seem a little counter-intuitive, we even hoped to get a nice snowfall after sowing because—as the snow gently melted—it provided the perfect moisture levels for the vegetables, didn't compact the soil, and resulted in near perfect stands of seedlings.
The reason we don't wait until May 24th to sow our vegetables was simple: we wouldn't be have been in business if we adhered to that date. Early sowing means a much longer harvest season, which is exactly what our our customers wanted, so sowing many of our vegetable crops "early" was just standard practice.
p.s. We've received a lot of calls about whether now would be an appropriate time to prune trees such as apples, maydays, or cherries. This is a perfect time to prune those types of trees! So if you've been thinking about pruning, consider this your sign.
On that same note: March 31st is the last day to prune Elm Trees in Edmonton. After this, the annual ban on Elm Tree pruning is in effect until October 1st. This ban occurs every year and helps prevent the spread of Dutch Elm disease. In the case of trees damaged by windstorms, fires, or lightning strikes, Elm Tree pruning exceptions may be granted by filling out an Elm Tree permission form with your local municipality.