Not to send you down a rabbit hole but I have used kelp4less nutes in the past. They are dry/powdered nutes. Pretty cost effective. I like the Extreme Blend in particular. It has kelp, amino acids and humic/fulvic acid. My Christmas cacti all flower a few weeks after I feed them Extreme Blend. Supposed to flower once a year. I get 3 or even 4 blooms from the plants. I have a 20+ year old poinsettia I hit with the stuff last month and the leaves are turning red without light deprivation. Weird. They sell a grow pack and a bloom pack I liked too. I switched to Advanced Nutrients last year because I can help myself tinkering around but would buy the krlp4less line again. The rabbit hole gets deeper with the variety of additives they have.