Inside The New York Botanical Garden

Tip of the Week — 7/1/08

Posted in Gardening Tips on July 1 2008, by Sonia Uyterhoeven

Slugging It Out

Sonia Uyterhoeven is Gardener for Public Education at The New York Botanical Garden.Seibold's plantain-lily

I love hostas. Since they are so overused they have the potential for being an exceptionally boring plant, yet they are saved by the fact that they excel in shade, are wonderful foliage plants, and come in so many different shades, textures, and sizes.

The only problem is that by midsummer they are full of holes. Hostas are a staple of the slug’s diet, so often a little extra care from the gardener is needed to keep them from an “unholy” state.

Commercial products that prevent slugs from devouring hostas contain iron phosphate and are safe and easy to use. There are also many home remedies. The classic one is to set out a bowl of beer, leading to the slugs drowning to their delight. Rumor has it that slugs will travel up to two miles for a good drink.

Another simple alternative is to surround your hostas with a small barrier of used coffee grounds: caffeine kills slugs. You can also surround your hostas with diatomaceous earth or trap them with grapefruit rinds (you are then left to clean up the mess). Hostas that have thick, puckered leaves are less susceptible to attack.