Are eastern prickly pear (Opuntia humifusa) cacti pads as edible as the kind you find in the grocery store (Opuntia ficus-indica)? I know the fruit is edible, if everything across the Internet I've read is correct, but I'm not so sure about the pads.
Anyway, it looks like we can grow them in our zone (I don't believe the regular ones that are largely known to be edible grow in my zone). I would like to grow them for food (not just the fruit, but the pads). I don't want to grow them if they're toxic, though.
I've seen one source that says all members of the opuntia genus have both edible pads and edible fruit. However, it was only one source, and I'm kind of suspicious, because I've heard of one species that might cause issues.
Does anyone here eat eastern prickly pear pads?
Anyway, if you can tell me a productive and definitely edible opuntia that will grow in zone 4 (even if it's not the eastern prickly pear), that would be great, too.