Hostas are wonderful shade and even occasionally sun plants–bone hardy in the cold, increasing in size every year so that you can divide them and either spread them around your garden, share them with friends, or have plants to sell at your garden club’s plant sale (but do be aware of those patented varieties!)
But what happens if you notice a hosta that’s not behaving like that?
Well, first thing first, take a closer look. Might you have a pesky underground rodent like a vole nibbling on the roots?
Are deer or rabbits nibbling at it from above? Is a woodchuck eating it from both sides?
If none of those things seems to be occurring, take an even closer look at the leaves. Do they exhibit anything out of the ordinary? If so, you may have a hosta infected with hosta mosaic virus, otherwise known as hosta virus X (HSX).
How does this virus manifest itself? It can appear any number of ways. The leaves can appear puckered or stippled or stunted. The color can appear broken–in fact, when the virus first appeared, many breeders thought they had new unique variations among hostas on their hands before the virus was recognized.
This fact sheet from the University of Wisconsin not only has some great information about the virus, but has some great photos of infected leaves.
HSX has been around since 1996 but I know when I was working in retail gardening (from 2001-2008) it was only beginning to be recognized as an issue so that tells you how long it took to catch on, even in the trade.
Thee is no cure for HSX. Infected plants need to be removed–carefully–from your garden and destroyed. Do not compost them! And now, after re-acquainting myself with these photos for this post, I need to go out to take a hard look at a couple of my own hostas!