I have been using Peters 20-20-20 with excellent results. Every watering (1/4 tsp. /gallon in late winter early spring) and full strength (1 tsp. /gallon every other week in the summer).

Thanks so much! Can I use this on other bulbs with similar success?

I use it as a general fertilizer for all my plants, including my orchids as a supplement.

I’ve had success with Miracle Gro all purpose liquid using the crystals mixed into water - diluted with every watering. I’ve since switched to hydroponics Masterblend since I now use coco coir and rockwool for seedlings with no soil.