So, I need to identify which vegetables can survive the harsh arctic conditions of the back garden, which shall henceforth be known as "The Arctic". The front garden, lovingly in deference to an amazing documentary I saw on YouTube about gardening in the sand in Vietnam, is known as "Vietnam".
West Side Gardener has a very helpful table. There will be LOTS of Collards, Spinach, and Kale in the Arctic this year!
| Plant | Sowing date | Hardy to | Notes | ||
|---|---|---|---|---|---|
| Arugula | August 15-September 15 | 15F/-9C | Holds up reasonably well to rain | ||
| Beets | Best in July 1-10, will work if sown until the 20th | 20F/-7C | Can go colder with mulch | ||
| Broccoli | fall/winter | Anytime in June | 25F/-4C (?) | Rain will probably kill it before the frost does | |
| overwintered | July 15-August 1 | 10F/-12C | these are the biennial sprouting broccolis | ||
| Brussels Sprouts | May 15 | 0F/-16C | Seriously, these taste nothing like the store-bought ones | ||
| Cabbage (for winter) | June 1 | 5F/-14C (hardiest varieties) | I haven't grown the spring cabbages like First Early Market, so I really don't know the timing | ||
| Carrots | July 1-15th | 15F/-9C | With mulch, these can be depended on to overwinter. An August 1st sowing still give useable, but smaller, roots. With carrots there seems to be big differences that are just related to how particular varieties grow as the days get shorter. | ||
| Cauliflower | fall/winter | June 1-30 | 25F/-4C (?) | Rain and slugs tend to do mine in before the cold does | |
| overwintered | July 15-August 1 | 5F/-15C | Takes soggy soil somewhat better than sprouting broccoli | ||
| Chard | Up until early August | 20F/-7C | Even if the plant dies back, often the crown survives to regrow in the Spring | ||
| Claytonia/Miner's Lettuce | August 10-25 | At least 11F/-12C | Fast growing, compact, does well under cover | ||
| Corn Salad/Mache | August 20-September 1 | At least 8F/-13C | Seems to thrive unprotected in our rainy wet winters | ||
| Cress, Garden (Upland) | By late August | At least 15F/-9C | Biennial plants can be started as early as late spring | ||
| Escarole/Endive | August 1-10 | Reportedly 5F/-15C | Good cloche candidate, since wetness is more of a problem than cold. Bitterness decreases with frost, and varies from variety to variety. | ||
| Favas | September,October | 10F/-12C | I sow in late September. I've gotten away with sowing them in November; they will grow a little even in winter, during any spells when temps are above freezing! | ||
| Kale | July 1-15 | At least 8F/-13C | Needs no protection | ||
| Kohlrabi | July 10-20 | 15F/-9C | Can go lower with mulch or under cover | ||
| Garlic | September,October | At least 8F/-13C | I plant in late September. Basically, if the ground isn't frozen, you can put them in. | ||
| Leeks | April-Early May | At least 8F/-13C | Big differences between varieties in terms of hardiness and bolting date. This entry reflects my experiences with Durabel. | ||
| Lettuce | August 1-10 | 24F/-4C | Another good cloche candidate | ||
| Minutina | August 10-25 | ~ 15F/-10C | Unusual, almost succulent leaves | ||
| Mustard | July 15-August 10 | 15F/-9C | Hardiness is variable, depending on variety | ||
| Onions | Most types | August 10 | 0F/-18C | Most overwintered onions dry down in June. Waterlogged winter soils can be a problem for all overwintered onions | |
| Walla Walla sweet | September 1-15 | Reportedly -10F/-24C | Walla Wallas dry down in July. | ||
| Scallions | June-September | At least 10F/-12C | This applies to Allium cepa types of scallions. A. fistulosum types are much hardier and non-bulbing, but also are less tender and hotter in flavor. | ||
| Parsnip | June 15 - July 1 | At least 8F/-13C | It's fun trying to keep these seeds damp until they sprout! | ||
| Radicchio | July 15 | Reportedly 5F/-15C | Leaf types are easier and more reliable. Don't dawdle in sowing this one! | ||
| Radishes | Through September | Uncertain | Various rots and soil dwellers spoil mine by midwinter, even though the plants are still alive | ||
| Spinach | August 1-15 | At least 8F/-13C | Under a cloche they can be depended on to overwinter | ||
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