Answer: Plants in containers are more susceptible to winter injury because their roots are exposed to extreme temperatures. The best way to overwinter your lavender is to sink the pot into the ground, in a well draining area (perhaps close to the foundation of your house?) After the first frost you can further insulate the plant with pine boughs or straw placed over the top. If you can't sink the pot into the ground, the next best thing is to put it in an unheated shed, close to a window where it will get natural light. A final suggestion is to keep the pot outdoors on your porch or deck, wrap the pot with insulation and set it in a larger pot. Then cover the plant with insulating material (pine boughs, straw, etc.) The whole point is to protect the roots from temperature extremes and to keep the soil from becoming waterlogged.
Hope these ideas work for you!
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