Link to StumbleUpon

Tuesday, September 21, 2010

Fall is a Good Time to Plant

The weather's changing and many gardeners have an eye toward cleaning up the garden beds and looking ahead to spring. Now is a great time to ramp up your gardening activities and actually start putting new plants in the ground. In the last couple weeks I've planted lilies, lavender, and three different trees. Fall planting is actually better than spring planting for many of your perennials and trees.

My new lavender
Plants tend to slow their root growth during the heat of the summer. As temperatures begin to cool, up to 80% of a plant's root growth happens in late summer and fall. Even after the foliage has faded, root growth will continue slowly until the ground freezes. You can take advantage of that normal cycle by planting now. If you live in an area with a mild winter or if your garden has a microclimate that provides more warmth, root growth may continue all winter.
As soon as the soil begins to thaw in the spring the root growth kicks in again. Plants put in the soil in the fall now have at least six months of growth advantage over plants put in in spring. The larger root system provides more vigorous growth of foliage and flowers.

When you plant in the spring, the soil may still be relatively cool. That will slow and may even stunt a plant's growth. When you plant in the fall, the soil is still warm from the summer and root growth happens faster.

When you plant in the spring, many pests are just waking up and looking for food as they attack your young, vulnerable plants. When you plant in the fall, many pests are dead, dormant, or at a different point in their life cycle and not as much of a threat.

When you plant in the spring, a sudden, unexpected weather change can devastate new plants. When you plant in the fall, weather changes aren't as critical because the plants have already handled a winter.

When you plant in the spring, you must maintain a steady regimen of water until the plant stabilizes and then maintain that watering through the summer because the soil dries out. When you plant in the fall, less water is required as the plant begins to go dormant and more water is available in the soil from winter storms.

When you plant in the spring, you pay the highest prices of the year at your local nursery or home improvement center. When you plant in the fall, you can often get plants at reduced prices or clearance prices. As a frugal gardener, this is one of my favorite reasons.

When you plant in the spring, you may be guessing at the best location for new plants in new garden beds. When you plant in the fall, you have a better understanding of which plants grow best in specific areas of your garden. If you had a plant do especially well, now is the time to add more. If something didn't work out, now's the time to replace it.

You should allow at least six weeks for the root growth to take hold, so plan your fall plantings for at least six weeks before your traditional hard frost. That doesn't mean a first frost. In areas like the Front Range of Colorado, we may get a light frost of 31 or 32 degrees F, followed by weeks of warm weather. That may kill some foliage but isn't deadly for most perennials and trees. A hard frost is when both the air and the soil are below freezing. That typically happens at 28 or 29 degrees F. That's the point that signals plants to start going dormant.

If a hard frost is predicted, followed by forecasts of warmer weather, you can protect plants with a blanket or plastic tarp. Lay the protection over the plants before the sun goes down. The warmth of the earth and soil will create a pocket of warm air under the cover and will help keep the ground from freezing. This may buy you a few extra days or even a few extra weeks of root growth. Remove the cover after the sun comes up the next day.

Take a look at your calendar and see if you have the remaining time. In our area, continual hard frosts usually start at the end of October. That still gives time to add to the garden. You might have more days than that and more options. Take advantage of it and get planting.
The weather's changing and many gardeners have an eye toward cleaning up the garden beds and looking ahead to spring. Now is a great time to ramp up your gardening activities and actually start putting new plants in the ground. In the last couple weeks I've planted lilies, lavender, and three different trees. Fall planting is actually better than spring planting for many of your perennials and trees.

My new lavender
Plants tend to slow their root growth during the heat of the summer. As temperatures begin to cool, up to 80% of a plant's root growth happens in late summer and fall. Even after the foliage has faded, root growth will continue slowly until the ground freezes. You can take advantage of that normal cycle by planting now. If you live in an area with a mild winter or if your garden has a microclimate that provides more warmth, root growth may continue all winter.
As soon as the soil begins to thaw in the spring the root growth kicks in again. Plants put in the soil in the fall now have at least six months of growth advantage over plants put in in spring. The larger root system provides more vigorous growth of foliage and flowers.

When you plant in the spring, the soil may still be relatively cool. That will slow and may even stunt a plant's growth. When you plant in the fall, the soil is still warm from the summer and root growth happens faster.

When you plant in the spring, many pests are just waking up and looking for food as they attack your young, vulnerable plants. When you plant in the fall, many pests are dead, dormant, or at a different point in their life cycle and not as much of a threat.

When you plant in the spring, a sudden, unexpected weather change can devastate new plants. When you plant in the fall, weather changes aren't as critical because the plants have already handled a winter.

When you plant in the spring, you must maintain a steady regimen of water until the plant stabilizes and then maintain that watering through the summer because the soil dries out. When you plant in the fall, less water is required as the plant begins to go dormant and more water is available in the soil from winter storms.

When you plant in the spring, you pay the highest prices of the year at your local nursery or home improvement center. When you plant in the fall, you can often get plants at reduced prices or clearance prices. As a frugal gardener, this is one of my favorite reasons.

When you plant in the spring, you may be guessing at the best location for new plants in new garden beds. When you plant in the fall, you have a better understanding of which plants grow best in specific areas of your garden. If you had a plant do especially well, now is the time to add more. If something didn't work out, now's the time to replace it.

You should allow at least six weeks for the root growth to take hold, so plan your fall plantings for at least six weeks before your traditional hard frost. That doesn't mean a first frost. In areas like the Front Range of Colorado, we may get a light frost of 31 or 32 degrees F, followed by weeks of warm weather. That may kill some foliage but isn't deadly for most perennials and trees. A hard frost is when both the air and the soil are below freezing. That typically happens at 28 or 29 degrees F. That's the point that signals plants to start going dormant.

If a hard frost is predicted, followed by forecasts of warmer weather, you can protect plants with a blanket or plastic tarp. Lay the protection over the plants before the sun goes down. The warmth of the earth and soil will create a pocket of warm air under the cover and will help keep the ground from freezing. This may buy you a few extra days or even a few extra weeks of root growth. Remove the cover after the sun comes up the next day.

Take a look at your calendar and see if you have the remaining time. In our area, continual hard frosts usually start at the end of October. That still gives time to add to the garden. You might have more days than that and more options. Take advantage of it and get planting.

4 comments:

  1. What great common sense advice!

    ReplyDelete
  2. Scott,

    You know how seeds fall from plants in the fall and reseed themseleves for spring? Is it feasible to go ahead and plant seeds in the fall for spring ie: cosmos, marigolds, etc.?

    ReplyDelete
  3. Lori, yes it's feasible to plant seeds in the fall. You can determine where the seeds will sprout by spreading them now. Many plants and seeds need a period of cold temperatures to germinate (called vernalization) and planting them now will provide that period. This works well with plants that flower in late summer or fall (like the ones you mentioned). Basically just follow the pattern that nature set. For almost any plant that reseeds naturally, you can collect the seeds and plant them in an area of your own choosing. Be aware that many of these seeds only need a scant covering of soil. If the area will be excessively moist in the coming weeks and/or you plant them too deep, you may have a problem with rot.

    ReplyDelete
  4. Scott,

    Super! I always assumed that because people start seeds in the house in the early spring that they wouldn't survive through the winter. That will save me alot of time.

    ReplyDelete