Preparing Plants for a Winter Indoors
By Ellen Brown
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Reverse Hardening
To plants that have spent all summer in an outdoor environment, an abrupt move indoors is akin to stepping off a spaceship onto another planet. To avoid stressing them (or worse), try to prepare plants for their new environmental conditions by acclimating them over a period of a few weeks before moving them completely inside. This is called reverse hardening. In the same way you harden off a plant before moving it outdoors, reverse hardening accomplishes the same process for the move back indoors. If seasonal changes cause you to bring your plants indoors before they've had enough time to adapt, use a transitional zone between your indoor and outdoor space (e.g. garage, porch or basement) to finish the reverse hardening off process.Inspect For Insects
Before moving your plants indoors, inspect them carefully for insects-especially those that have been sitting in pots on the ground. It is much easier to treat insect problems while plants are still outdoors, and you don't want to risk introducing any headaches to the rest of your otherwise healthy indoor plants. As an extra precaution, lift plants out of their pots to detect whether any pests have crawled in through drainage holes in the bottom. Treat insects by spraying the plant's foliage with water or a mild insecticidal soap over a period of three days before bringing it indoors (remove soap residue promptly each day to avoid burning leaves). A pot submerged in a pail of tepid water for a few minutes will send hidden bugs scrambling for dry land.Dim The Lights
It's impossible to mimic the intensity of outdoor sunlight indoors, but we can try. To acclimate plants to weaker indoor light conditions, gradually reduce their light levels while they're still outdoors . If they've been growing in full sun, move them to partial shade for a for part of the day, gradually moving them to full shade and finally indoors. Once inside, try to duplicate their preferred outdoors light conditions with as much natural light as possible. This is a great time to clean your windows! If you need to provide artificial lighting to supplement natural daylight, fluorescent (not incandescent) lighting is best. Be prepared to see a few leaves drop as plants adjust to lower light conditions.Ration The Food & Water
Most plants need less water and fertilizer in the winter because their growth tends to slow down in response to the lower light and temperature conditions. Water plants weekly or when the soil becomes dry to the touch. Unless the plant is showing a lot of new growth, it isn't necessary to keep fertilizing. This is especially true if the plant has been recently repotted. Plants kept growing vigorously by means of artificial lights should be given a water soluble fertilizer monthly and watered more frequently.Raise Humidity
With the exception of succulents that hail from arid environments, indoor air is much too dry in the winter for most plants. Keep plants away from heating vents and fireplaces and mist them regularly to prevent leaves from drying out. Groups plants together on waterproof trays filled with small pebbles and water to help keep the surrounding air humid as the water evaporates.Repotting
If plants have outgrown their present containers (roots coming out of drainage holes), or the soil has become hard or encrusted with salt residue, now is a good time for repotting. Tall leggy plants should be removed from their pots and their crowns and roots trimmed in equal proportions. Old pots should be scrubbed clean and the soil replaced with a sterilized commercial potting soil. New containers should be only 1-2 sizes larger than the previously outgrown containers.When To Move Plants Indoors
Many tender plants risk serious injury from the cold when nighttime temperatures drop below 45º F and most tropical plants below 40ºF. Because weather is unpredictable, it's best to play it safe. When temperatures start to drop below 50ºF for more than a few hours each day, it's probably best to move plants indoors. Other plants, like orchids, should be moved indoors when temperatures start reaching the 55ºF-60ºF range.About The Author:
Ellen Brown is our Green Living and Gardening Expert. Click here to ask Ellen a question! Ellen Brown is an environmental writer and photographer and the owner of Sustainable Media, an environmental media company that specializes in helping businesses and organizations promote eco-friendly products and services. Contact her on the web at http://www.sustainable-media.com
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