I'm sure the brand isn't critical, just the dilution. And I'm sure leaves with a little dew would work best, but I believe any live leaves would suffice. The fertilizer should soon inspire more leaves to be produced. Once larger leaves are being produced, more typical feeding should be suitable. I use a little, most all the time, but after the plants are vigorously growing larger, I often switch to using dried, fresh insects, ground to a powder.