When You’re Cold, They’re Cold!

By: Dave Zeldon and Ely Schweyer

Most experts agree that we shouldn't bother bringing in our favourite summer potted plants for the winter and that we should buy new again the next season. But this seems to go against our sensibilities after paying good money earlier in the season. Why not try to save that bay tree, those Rosemary, and French Tarragon containers, as well as expensive Phormium, Mandeville, Passionflower, and Jasmine plants?

   The secret to indoor survival for summer plants is to slow down their growth during the winter, so they’re ready to be put outside again once all the danger of frost has passed. How? A few weeks before fall frosts are expected, gradually introduce plants to life indoors by moving them inside (to a quarantined spot*) for half a day, working up to a full day over a week or so. Don't wait until nighttime temperatures are only slightly above freezing as the plants may go into shock and drop leaves!

How to Keep These Guys Comfy During the Winter Months?

• It is suggested that you should prune back excessive growth and re-pot with new lighter growing media.
• Place them in the sunniest location you have and then water sparingly but regularly over the Winter.
• Raising humidity by using a humidifier helps too.
• Resist the urge to fertilize these plants until just before you reintroduce them to outdoor living.
• Perhaps just for fun, you could repot them into the appropriate seasonal pots and planters!

It Seems They Brought Others in With Them - And They're Not Nice House Guests

*Before long, you may notice some unwanted guests, such as thrips and spider mites, on and around your precious plants as their natural predators are no longer present to keep their populations at bay. In many cases, it may be too late, and your plants may have to be discarded before the Holidays, but that’s not always the case!

   Common problems that make themselves apparent indoors would be the brown soft scale insect, whiteflies, mealybugs, aphids, spider mites and most often, fungus gnats (those pesky little black flies).

   Fungus gnats are considered to be the most common nuisance in houseplants. Sometimes their sheer numbers just hovering around an attractive plant take away from its appeal.

Basic Fungus Gnat Control Measures:

The fastest and easiest method of control is to catch the flying adults with yellow sticky cards. The large cards can be cut into little strips and mounted onto little wooden splints (popsicle sticks) then placed around the base of the plant out of the line of sight.

   The chances are that the adults have already deposited eggs in the growing media (soil) of the plant as it is rich in organic matter, so we can disrupt its life cycle by:

• Subirrigation - water your potted plant from the bottom by adding water to the saucer it is sitting in. This will dry out the soil surface making it uninhabitable for the hatching larvae.
• Trapping larvae - If the surface soil it already very wet, try placing a few potato discs or slices on the surface of the soil. This will attract the larvae as they migrate to the potato to feed. Simply replace the discs every five days or so with fresh slices to eliminate the next generation of adults.
• Inoculating the soil with beneficial nematodes. Most garden centres will carry the Guardian line of beneficial nematode products.

We hope this helps your plants enjoy your winter abode as much as you do this season, for more information - and plants – visit Eising Greenhouse and Garden Centre!