Let’s be real: without a little extra TLC, most of our favorite Mediterranean plants wouldn’t stand a chance against a harsh northern winter. Very few of them are truly “hardy” in the way a native oak tree is. However, if you have plants that are considered “semi-hardy,” they can actually do quite well outdoors if you give them the right protection.
Which Mediterranean plants can stay outside?
Generally, any Mediterranean plant labeled as “hardy” can handle wintering outdoors. If you live in a region with a milder climate, your semi-hardy varieties might be fine out there, too. But here’s a pro tip: it’s not just the nighttime lows you need to worry about—keep an eye on the wind! A biting, icy wind can be just as deadly as a deep freeze, even when temperatures are technically above 32°F. The best defense is a sheltered spot. If you can, try to keep wind protection in mind when you’re first deciding where to dig your planting holes.
How do I protect my plants from frost?
Semi-hardy plants—which include a huge chunk of the Mediterranean family—usually need a bit of a winter coat. The golden rule here is to make sure the material can breathe; you don’t want to suffocate your plants! A thick layer of leaves, straw, or mulch works wonders as insulation. I like to mix in some small branches or brushwood; it keeps the airflow moving and prevents your mulch or straw from blowing away in the first winter storm.
Now, let’s talk about bubble wrap. While it gets a lot of hype, it’s actually a bad idea for wrapping the leafy parts of your plants because it traps moisture and prevents air exchange. However, it’s a total lifesaver for protecting the root balls of potted plants. Wrap the pot itself in bubble wrap to keep the roots cozy, but use an old burlap sack for the plant itself to shield it from frost and wind.
Which Mediterranean plants need to come indoors?
If you have very frost-sensitive Mediterranean varieties or potted plants that can’t handle the chill, they’ll need a proper winter home. This space should stay frost-free, and if your plants are evergreen, they’ll need plenty of light, too. Don’t forget: even though they’re “resting,” these plants still need a regular drink of water throughout the winter!
Quick Summary:
- Use mulch, straw, or leaves for frost protection.
- Mix in brushwood or branches to improve airflow.
- Protect the “above-ground” parts of the plant from black frost and icy winds.
- Always ensure your protective covers are breathable.
- Save the bubble wrap for the pots, not the foliage.
- Keep watering your evergreens during the winter months.
- Move sensitive plants to a frost-free indoor winter quarter.
Pro Tip: When prepping your Mediterranean garden for winter, remember that frost isn’t the only enemy. Icy winds and dehydration (drying out) can be just as dangerous for your green friends!