I know this is an old thread, but I use a lot of fish emulsion in a spray to foliar feed. I always do this at dusk and when I finish put my clothes in the washer and head for the shower. I put a glup of FE in a gallon of warm water.
Coleus plants also like this poured on their roots too. I think it helps their color.
I just bought my first three coleus for 2013 and am considering fertilizing them this year so I have a couple of questions.
1 - I've been growing coleus for about 8 years and have never used fertilizer except when I first pot them up. Then I always use a good quality soil and they get a dose of both EB Stone Starter Fertilizer and earth worm castings. The plants grow so big and look so good that they don't really seem to need any help. In fact I have to prune them back to keep them from taking over. I've never had any pests, and they only time they stress is when the drip irrigation system goes wacky and they dry out or get flooded. So would the colors be stronger and brighter? Would they be more likely to over-winter better as a full plant rather that taking cuttings? What other advantages would there be? Basically would it be worth the effort?
2 - If I do fertilize I'd like to use fish emulsion and am curious about how to use it to foliar feed as Sugarweed mentioned above. I've been told that it will clog the filter, so I'm assuming you strain it well first, but doesn't that take out too much of the good stuff?
I've never had to strain. I use a pump mister and put a teaspoon of Alaskan FE in a liter of water.
I mist them good all over. Be sure and stay upwind of the mist. It does stink.
Pinch back every time I water.
Dottie, put the lid on and shake it really hard for about 30 seconds. See if it comes out. I have a gallon in Jax and put a pint in an empty detergent bottle. If yours still doesn't come out, add some water and shake again. I put a teaspoon in a gallon of water and mist my plants with a pump sprayer. I also add a drop of Superthrive.