I don't use fish emulsion on my orchids; but I do use Maxi-Crop, which is a seaweed derivative. No odor. Over 60 micronutrients. Can't buy it at the big box store; but some nurseries sell it, or Ace Hardware stores do. A little goes a long way; just a capful in a gallon water and then I put it in a small sprayer. It 's a foliar spray - and it's not really a fertilizer, but I do notice the difference. It boosts stressed plants.
