Garden Minute: Overwintering Tropical Plants

tropical

As a horticulturist and grower I love to collect many types of plants, especially during the summer. Once the threat of frost or hard freeze approaches during the month of October I am always sad to see the end of the growing season. Now is the time to take inventory of my tropical plant collection, since I don’t have a greenhouse, or a sunroom, and prepare the indoors for the many plants that are going to spend the wintertime indoors.

Follow the Sun, and take note of where the sun plays upon the rooms in your home. Most tropicals prefer warm, bright surroundings, but some can do well in moderate indirect and even low light, depending on the variety of plant.  Temperatures in the 60 -70 degree range during the day are ideal.  Temperatures above 80 degrees can cause poor air circulation, which can lead to insect problems down the road.

hibiscusTry and be selective when deciding what plants you want to over winter. Take serious inventory of your potted tropicals and bring in only what you have room for.  If you want to overwinter a flowering tropical such as hibiscus decide you have enough light for the plant to continue actively growing and flowering during the winter.  If not, consider cutting the plant back approximately 1/3 and let it go dormant. Do the same for tropical vines, Dipladenia and Mandevilla vines.  If you are considering bringing in annuals, like geraniums, lantana, or coleus, find the sunniest location and modestly cut back, and or take cuttings from them. Tropical foliage plants such as Boston Ferns, Peace Lily and varieties of Palm are great to over winter, because they enhance the beauty aa well as the air quality in your home.  Succulents aside from being a strong trend in home design are the easiest to maintain and can adapt to, not only bright indirect light, but moderate light as well and require little care and water.

IMG_0085Transplant any plants that have outgrown their pots over the summer.  Select a container with proper drainage holes and a slightly larger diameter than the pot the plant is currently in. Keep plants away from any forced hot air, like heating vents and any severely drafty windows.  You also want to increase humidity in your home.  Don’t worry it sound a lot more complicated than it actually is.  Simple take a saucer filled with crushed stones and keep the stones moist. Another trick I use often is grouping my plants together if space allows.

Allow plants to dry thoroughly between each watering, this helps to minimize fungus gnat problems that may arise from the soil.  Be sure to hose down the plants with water and an insecticidal soap before you bring them indoors. You want to be sure to clean off insects that may be hiding out on your plants.  Add a granular systemic insect control to the soil every 4-6 weeks to ensure your plants stay insect free and healthy.

Overwintering tropicals can be a fun project for the winter months.  It will keep your hands in the soil and your passion for gardening all year long.