What to plant this week in Windsor, ON
Windsor gardeners are in the final countdown to winter; with average last frost still hovering around April 3, now is strictly the time to plant garlic cloves for a fall harvest. While your daikon radishes and spring garlic heads may be ready to pull from the soil soon, keep an eye on lingering cold snaps that could damage tender roots before the ground fully freezes.
The next 7 days
Windsor, ONGrowing in Windsor right now
- Windsor's heavy clay river valley soil retains moisture well but requires generous organic matter amendment to prevent compaction during these cooler weeks.
- Although frost dates suggest April 3 as the average last freeze, microclimates along the Detroit River can experience late cold snaps; cover sensitive potted plants with row covers if temps dip near zero tonight.
- Do not attempt any spring transplants yet; waiting until after the official last frost date in early April will give your seedlings a stronger start against Windsor's unpredictable winter winds.
Sow this week
1 crops- Garlic
Transplant this week
Nothing is due to go out this week.
Harvest soon
2 crops- Daikon Radish
- Garlic
Seasonal tips
- Plant garlic cloves now to ensure a strong spring harvest next year.
- Apply winter mulch around perennials once the soil has frozen solid to protect roots from heaving.
- Divide biennial plants like sweet Williams if they have finished flowering this season.
Pest & disease watch
- Watch for overwintering flea beetles that can emerge as soon as soil temperatures rise above 40°F, threatening your future daikon radish harvest.
- Check garlic plants for onion thrips or mite damage now before the ground freezes, as these pests often hide in the foliage during cold weather.
Watering this week
Water deeply but infrequently, allowing the top inch of soil to dry out between sessions to prevent root rot in cool, damp conditions.
Mark your sown garlic spots clearly now so you won't forget where they are when digging for spring onions later!
Windsor gardening questions
3Can I plant anything else in the ground this week besides garlic?
No, based on current zone 7a conditions with frost dates until April 3, you should only sow hardy crops like garlic now. Attempting to start tender seedlings indoors or transplant outdoors too early will likely result in frost damage.
Is there any risk of late frost damage if I leave my crops in the ground?
Your daikon radish crop can be harvested soon as soil conditions permit, while the fall-planted garlic needs several more weeks of cold to bulb properly before digging.
What should I do with my garden beds after harvesting the daikon radishes?
Since Windsor winters are harsh, you can either mulch the harvested spots heavily to protect remaining garlic or clear the bed and let it freeze naturally to break down soil structure.
Other cities in zone 7a
12See the full zone 7a guide → · Plan your Windsor garden in SproutGuide →