Photosynthesis by D.O.Hall & K.K.Rao says that photosynthesis increases linearly up to about 10,000 lux or ~100 watts/square meter before beginning to exhibit saturation effects. Thus, most plants can only utilize ~10% of full mid-day sunlight intensity. This dramatically reduces average achieved photosynthetic efficiency in fields compared to peak laboratory results.
Climate will havea lot to do with it as well. Can't imagine growing cucumbers or tomatoes here in the shade
also, i dont think is good idea to put all those plants into one pile - there is plants that normaly grow in sun, but can tolerate some shade,
NZ flax isn't edible but is medicinal and useful for fibre.
The final chart will show which are shade tolerant and which require shade.
Cucumbers don't do particularly well in shade in my experience
Rob S. aka Blitz wrote:
We should add to the wiki once we all agree.
H Ludi Tyler wrote:
I'm especially interested to know if there are any edibles which are tolerant of dry shade.
I still think the list needs to be sorted by climate, and kinds of shade - that way it will be more useful (otherwise people will still have to research and sort themselves).
I saw the bits about shades, but not about climate
A plant that can tolerate all day shade in one climate isn't going to tolerate it in another. And it's not just hot vs dry, moisture comes into it and whether it's hot all year or summer hot, winter cold etc.
To stop that from being overly complicated I think you could divide between tropical/subtropical and temperate, and then between max/min average temperatures. But people that live in colder climates than me might have different ideas.
I live in a hot summer, cold winter, temperate climate (but with more intense UV than many other places that are hotter). I can grow tomatoes outside here, but I doubt they would do well in the shade, likewise cukes. I'm guessing the people who can grow them in the shade have higher temperatures across the season than I do, and probably across the day/night. To me tomatoes want heat, whereas I grow leafy greens in the shade because they want protection from the intensity of the sun in the summer.
The other factors I've been thinking about are summer vs winter vs shoulder season sun (esp for ripening), whether there is early morning sun or not (early morning sun here is a limit because the sudden thaw of frosts is a problem), and whether the plant is in full shade but lots of light (behind a wall) or in full shade but low light (in a forest/under other plants).
Cilantro/coriander seems to tolerate just about anything thrown at it.
Hugh H. wrote:
Ludi, just came across another one for dry shade which I recall was mentioned in Martin Crawford's book - Rubus tricolor. It is a creeping groundcover raspberry.
H Ludi Tyler wrote:
Not in my climate. Here it's very picky.
Benjamin, how do you want to organize your list?