In article ,
Janet wrote:

Periwinkle is a cheap low risk choice for a tough spot; tolerates poor
conditions; fast evergreen coloniser, minimum maintenance, tough as old
boots.
I prefer vinca major, the two "old " ones with large leaves and single
blue flowers, one is dark green leaf and the other handsomely variegated.

I grow "oxyloba", another old variety with smaller, lighter green,
less glossy leaves but very dark, star-shaped flowers. However,
ALL Vinca major are seriously invasive - even V. minor is pretty
invasive. They are shallow-rooted, so suffer in drought, but
V. major is more resistant.

Most of the plants mentioned so far will help with erosion and
help to reduce weeds.


Regards,
Nick Maclaren.