why do hosta leaves turn brown at the ends and / or edges?

Question

I have two very large hosta plants next to a patio in Columbus, OH.  I do not know how old they are but at full growth are about 3.5 ft across.  Every year the leaves turn brown around the edges and at the tips.  I thought this may be due to insufficient water and was determined this year to water more.  We have had a good bit of rain this spring, every 2 or 3 days, and yet, I see the leaves beginning to brown already.  Any suggestions?

Answer 1

spray them with soapy water.......1 teasp liquid soap & 1 qt water in spray bottle.