How to Grow Shrubs in Containers
There are several benefits to growing shrubs in containers. The issue of the permanency of planting shrubs is no longer a consideration. Small gardens can benefit from container shrubs. A wider variety of shrub species is available for planting. By bringing container shrubs into the home over the winter, you've eliminated the effect of extreme winter conditions. Does this Spark an idea?
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Instructions
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The Right Shrub
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1
Know the hardiness zone of the shrub. Having a shrub in a container will alter its hardiness zone. Generally, a container shrub will have a hardiness zone up to two levels higher than if it were planted in the ground. So, a shrub that falls in zones 4 and 5 will be hardy 6 to 7. This is only a general guideline.
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Research the particular needs of the shrub that you want to plant. In addition to hardiness, consider the lighting it requires. Knowing this can guide your choice of placement for the container.
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Learn its soil needs. Look into what pH is required as well as the type of soil. With this information in hand, purchase potting soils and supplements that meet the shrub's requirements.
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Choose a container that will take into account future growth. Since shrubs are larger plants, re-potting may be difficult later due to its size.
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Note that when choosing shrubs there will come a time when they may have to planted outdoors. At some point, a shrub may outgrow any size container. In which case, it is best to re-plant them. Have in mind a potential planting area.
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Know if the shrub is considered noxious. Some plants are listed either at the state or federal level as noxious weeds. These plants may be invasive and out-compete native flora if planted outdoors. Avoid buying any potentially noxious plant.
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Pay attention to the watering needs of your shrubs. Container plants can dry out quicker than in-ground plants. Check the soil frequently to assess water needs. Mulching around the shrub also will help prevent water loss. A 2- to 3-inch layer will suffice.
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If you plan on bringing plants in during the winter, make sure you have a space available. Be aware that sudden changes in temperature can shock plants. Bear this in mind when selecting the temporary winter area and the timing for the move.
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Prune the shrub when needed, but keep it at a minimum. In addition to thinning a shrub, pruning paradoxically encourages plant growth. When the terminal bud is removed, branch growth stops. However, side buds are free to grow. Always choose a plant that will fit in the space you've allowed for it.
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Tips & Warnings
Bear in mind the size and weight of the container with the shrub, especially if moving indoors during the winter months.
When choosing a container, look for one that will be easy to lift.
Pay even closer attention to water requirements during the winter months. With lower humidity, plants will dry out quicker.
