Green leaves are the norm. Yellow, orange, red or purple leaves can be interesting or just plain weird. But blue—blue leaves make me go weak at the knees.
A bluish cast is the result of either a waxy coating or irregular microscopic projections from the epidermal cells that reflect sunlight. It’s easy to tell what it is. Simply touch a leaf, and if the bluish color goes away, it was wax.
These mechanisms protect the plant either from water loss or from sun damage. Desert-adapted plants are more likely to have bluish leaves than tropical plants growing in environments where water is abundant. Makes sense, doesn’t it?
So without further ado, here are some of the plants with glaucous foliage in my garden. Coincidentally, all of them are succulents.
Agave pygmae ‘Dragon Toes’