I'm currently planning planting for two shady areas: our front balcony and our front porch. Both of them are north-facing, so I've been researching north-facing and shade-tolerant edibles which will grow in containers. Most edible plants do prefer full sun; but if you've got shade, all is not lost.
Not all shade is created equal. Some people distinguish between open, medium, and deep shade. By that reckoning, I have open shade on the balcony (which is north-facing but very open and with little shade from the front) and medium shade in the porch (north-facing and covered). Another potential distinction is between partial and full shade. I have partial shade on the balcony and full shade in the porch.
Shrubs and climbers
- Honeyberries look very interesting, are perennial (I like perennials), and apparently prefer partial shade. However, you need 2 plants for pollination. They can be grown in a half-barrel size pot, which is probably no good for my purposes as I'm not sure I want two of those on my balcony.
- Kiwi vines are moderately famous for being a climber that will do well in partial shade. Again, you need both a male and a female plant, and something for them to grow along.
- The Oregon Thornless blackberry will apparently also do well in partial shade, although again it needs a trellis to grow up and to be carefully trained. It flowers on one-year-old wood. In theory I accept that blackberries, as woodland plants, should cope well with partial shade but I confess I'm not convinced about how well they'd actually fruit. Your pot needs to be 2' x 2' x 2.5' for this.
Lower/ground cover plants
- Mint is one of the easiest things to grow in shade. I grew mint in a pot on the windowsill of a full-shade area outside our basement flat about a decade ago, and it did just fine. Mint is best grown in a pot even if you have ground available, as it is famously invasive.
- New Zealand spinach is a shade-tolerant edible perennial, but needs to be blanched before cooking. Apparently it's best started from transplant, so if anyone who's reading has one and might be up for sharing a cutting, please let me know. Though to be honest anything that's complicated to cook is unlikely to find much use in this household, so it may not be worth it anyway.
- Apparently, swiss chard, peas, beets, and various leafy greens and salad greens are all shade tolerant too. This does fit with my experience of chard and leafy/salad greens as happy to grow through winter, when they don't get much direct sun. It occurs to me too that planting in partial shade may inhibit bolting, meaning that we might actually have some salad greens to eat in midsummer. Similarly, I've had trouble in recent years with peas suffering in the unusually warm spring weather, so partial shade might help them. These can all be grown in pots, though watch this space for a roundup of which plants need deeper and less deep containers. The only problem for me with growing greens on the balcony is that they're less harvestable for the kitchen, so cooking greens may not get so much use. Salad greens which can be nibbled while out there might be better.
- Finally, in the fruit line, Alpine strawberries are shade-tolerant, perennial, and very tasty, and rhubarb is shade-tolerant (indeed, it dislikes full sun) and can be grown in a (large) pot. I have some down the shady end of my garden which I'm hoping will get themselves properly established this year.
- Pansies are tolerant of shade, are perennial, and are one of my favourite flowers (I already have some on the balcony, in fact), but aren't edible.
- Violets, on the other hand, are edible, perennial, shade-tolerant, and also lovely.
- Other woodland flowers are also worth considering as they tend to be shade-tolerant.
- Another option is plumbago: shade-tolerant, perennial, not edible, but butterflies love it.
- I think nasturtiums should do reasonably well in partial shade, although probably not in full shade.
I found a list of other shade-tolerant edibles, which all seem likely to be a bit big for my purposes but might be useful for someone else, especially if you're not limited to containers. There's also a more general round-up of shade-tolerant gardening (not edible focused) at The Savvy Gardener. I'm very open to more suggestions if anyone has some, in particular for edibles although I'll consider some pretty non-edible perennials as well.
Next steps: researching which plants need what depth of container (and in particular what will tolerate shallow containers), gathering my containers together, and constructing a planting plan for the spring.