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Container Gardening Tips


Container Gardening Tips

Container gardens have become popular in recent years due to several factors. Many people now reside in high density housing plans without a large yard to landscape. As the population ages, older gardeners like the fact that containers are less physically demanding to plant and care for. This type of gardening is also becoming popular for those who have little time for a large-scale garden project, but still enjoy the beauty a garden provides. While container gardens tend to be high maintenance due to the amount of watering and grooming they require, they do not require extensive soil preparation, mulching, and weeding like traditional garden beds.

Choosing a container
Use your imagination! There are many types and styles to choose from.

  • Ceramic, plastic, wooden planters and window boxes are available. Also, galvanized buckets and tubs, whiskey barrels and moss-lined baskets, terra cotta. The general rule is to use the largest container possible. The more soil the better for the plants.
  • Never use a container that may have contained anything toxic to people or plants.
  • It must have drainage holes drilled into the bottom. Don't let your plants sit in water! After an hour empty drainage trays.
  • Consider the size of your containers in relation to how often you will need to move them. Also make sure your porch, balcony, deck or rooftop can support the weight.
  • Make sure the pot is large enough to hold a sufficient amount of soil without spilling over, and for the plants to reach maturity. A general rule is the container should be wider than it is deep.
  • Soil
  • Start with fresh soil each year to avoid disease or insect problems from the previous year.
  • Do not use soil from your backyard. Garden soil is often too dense and can introduce unwanted disease and insect problems.
  • It is essential to use a light, friable soil that will drain well and retain moisture. A proper mix also allows for air space in the container for proper root development.
  • Soil should have enough organic matter to hold a sufficient amount of moisture, but not so much that the plant roots are sitting in a pool of water.
  • Try to use equal parts topsoil, compost, and a soilless mix,
  • Moisten the soil before filling the containers to within one inch of the top.
  • At planting time add a granular fertilizer (10-20-10) along with a slow release fertilizer (14-14-14). When plants are well established, begin weekly feeding with an all purpose liquid fertilizer. This will give your plants a quick boost, especially if they have recently been cut back or look stressed.

What to plant
Just about anything can be grown in a container. A few to consider are colorful annuals, vegetables, salad greens, herbs, and small shrubs and trees.

  • Consider your growing conditions. Start by thinking where the pots will be located and then find plants that will grow well in that location.
  • Be creative! Try different plants together, varying textures, heights, leaf shape and sizes to give the containers a full lush look.
  • Experiment with bold contrasting colors like burgundy and orange. Try a planter that uses only foliage plants like hosta, dracaena, grasses and ferns.
  • Place plants with similar needs together; plants that need a lot of water and little sun should be in separate containers from plants with the opposite needs.
  • You can mix herbs and flowers together, vegetables and flowers, flowers and small shrubs, etc.
    See the plant list for more ideas

Water

  • Check on the plants daily to make sure they are getting enough water.
  • Don't let the plants dry out or get too soggy.
  • Watering thoroughly as often as needed. Note: Most containers planted in the full sun will need daily watering.
  • Water until the entire soil area is moist and water runs out of the drainage holes.
  • Cluster your potted plants together to reduce moisture loss and increase humidity levels.

Fertilizer

  • Fertilizer can be purchased or made from composted organic matter from your garden or kitchen.
  • An all purpose flower or vegetable fertilizer with a 10-20-10 formulation along with a slow release fertilizer 14-14-14 mixed into the soil at planting time works well.

Maintenance

Each week during the growing season:

 

  • Remove spent flowers, yellowing leaves and pinch back leggy stems. When necessary replace tired plants with fresh annuals, especially late-season plants like flowering kale, pansies, and mums.
  • Fertilize once a week with an all purpose liquid fertilizer
  • Trim vining plants to keep them bushy and in proportion with your pot or window box.
  • Give smaller pots a quarter turn every couple of weeks to ensure even growth.


Diseases & Insects

  • Inspect plants regularly to identify any problems before they get out of control.
  • A safe herbicide-fungicide can be made from 5 tablespoons of vegetable oil, 1 tablespoon of baking soda, 4 tablespoons of Safer's soap (or 2 tablespoons of liquid dish soap) mixed with 1 gallon of water. Spray infected plants in the evening after the sun goes down.

Light

  • Different plants need varying amounts of light.
  • Most annuals can tolerate a full day of the blazing hot sun. They do well on a patio or deck.
  • Other plants like ferns, tuberous begonias, or hostas grow best on a front porch or covered balcony where they can receive shade from the hot afternoon sun.

Wind

Plants benefit from air movement because it helps to decrease insect and disease problems. However, too much wind may blow over the containers and cause breakage.

Resources:
Gardeners Supply Company www.gardeners.com
Penn State Garden Notes May/June 1999
National Gardening April 1999
Green Scene the Pennsylvania Horticultural Society July/August 1999


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