7 months, 1 week ago Fertilizing hostas? Q&A Need info about fertilizing mt hostas. - Karen - Comments Jo Co Master Gardener 7 months, 1 week ago If your hostas are established plants, you can fertilize them in the spring as they begin to emerge. Use a fertilizer with a slow-release nitrogen source (5-10-5 or 10-10-10), or composted manure, which you can lightly work into the soil surface around the base of the plant. Be careful not to overdo the fertilizer. In this case, less is best. Once established, most perennials don’t need a lot of fertilizer. Hope this answers your question. Carole Johnson County Extension Master Gardener karen magill 7 months, 1 week ago Thanks, now should my hostas be popping up thru the ground yet? Some of them are. But most of them are not yet. Thanks Jo Co Master Gardener 7 months, 1 week ago Karen, don’t worry. Not all of mine are up yet either. It depends on the micro-climate and cultivar. Those of mine that are coming up are in a warmer area of the garden. Be patient. This is a good time to identify those areas of your garden that are warmer or cooler than others, so you can choose plants accordingly. Happy gardening. Carole karen magill 6 months, 4 weeks ago Ok well there is still no sign of them. Thanks Sign in with Facebook to comment. Copyright 2013 The Kansas City Star. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.