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Determining soil drainage conditions

March 16, 2009   •   

Most plant tags say that the plant requires “well-drained soil” or  “excellent drainage.”  What exactly does that mean?  How do I know if my soil is well-drained?

Plants that require well-drained soil are sensitive to prolonged periods of saturation since oxygen has been displaced from the soil pores. Only a few plants like willows and red-twig dogwood can tolerate this condition, while most others require much better drainage. To determine whether a soil is well-drained, first ask the question, “Do I ever see standing water in that spot?” If the answer is yes, then you’ll not want to consider this area well-drained. If no standing water occurs, dig a test hole about 12 inches deep and 16 inches across. Fill the hole with water and watch how long it takes to drain out. If the hole completely drains within a few hours then consider yours a well-drained soil. Keep in mind that these conditions can vary greatly from place to place within your yard, especially near low areas or where soil compaction may once have taken place. If you wish to plant in areas that do not drain as well, keep in mind that a very wide or elevated planting hole may be the key to establishing a plant in that situation.

Filed Under: Ask MG

Birds nesting in hanging planters

March 16, 2009   •   

Birds are nesting in my hanging planters.  I don’t want to harm them, but what can I do to discourage them?

You can discourage birds from nesting in hanging baskets by putting the basket on the ground for three or four days. Birds normally like to nest in high, protected areas.

Filed Under: Ask MG

Clematis not blooming

March 16, 2009   •   

I have a 3 year-old clematis that has never bloomed. Why not?

There may be a few reasons why a clematis may refuse to cooperate when it comes to flowering. One of the more common reasons is inadequate sunlight. Clematis should receive a minimum of 6 hours of direct sun to insure that they have enough energy to produce flower buds. Clematis foliage loves the sun, but their roots like cool and moist conditions, so be sure to provide shading for the base by placing another plant or object in front and by maintaining a 2-inch layer of mulch over the rooting area.

The other reasons for not flowering may include improper pruning, as well as damage due to winter exposure. Some clematis varieties flower on new wood, while other varieties produce their glorious flowers on old wood, or last years’ growth. If an “old wood” variety is cut back in the spring, then so goes the flowering for that season. In order to determine if your clematis blooms on old wood or new wood, wait for new growth to begin. Note whether the majority of shoots are coming from the ground or from the old vines. If the shoots are coming from the ground, the old vines may be cut down. If the new growth appears on the old vines, only prune dead wood.

Lastly, if your clematis is an old wood variety located in a winter exposed area, you might be losing stems to drying and cold damage. Large amounts of dead wood in the upper portions of the plant are an indicator of this condition. Without healthy old wood, these clematis are unlikely to bloom.

Filed Under: Ask MG

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