Our club had a sale in a nursery and the lady brought a lot of leaves for sale. After the end of the sale - she said - whatever is not sold - for grabs. So I ended with 10 baggies of mins and semis. The first set of mouse leaves showed up in about 10 days. My eyes popped - and I called her. She dipped them in superthrive before packing them in baggies. I do not think we need to add Superthrive to water the adult plants - the difference is probably not worth the bother. But if you have leaves or cuttings - spraying them with it makes sense. But spraying makes sense anyway. I. - can live with it or without it.

Dyna-Gro has the best all around N-P-K ratio as well as micro nutrients and is the choice of many. tj

Coming from a professional horticulturist, I agree almost entirely with irina :-) Nothing supersedes proper culture and care. Proper heat and light, proper potting soil, proper watering and proper fertilization. Amendments for any kind of houseplants are almost always unnecessary. And in some cases, can be counterproductive. Mycorrhizae is completely ineffective in an indoor container growing situation with a soil-less potting mix. Won't hurt but doesn't help. Save your money :-) Superthrive (aka 'Superjive') is just heavily promoted snake oil. All it contains are some rooting hormones and B1. And you dilute it down to where it is almost nothing but pure water anyway!! B1 is not a necessary plant additive (plants make their own) and a rooting hormone is only necessary if you are rooting. Save your money :-) Kelp or any other organically derived fertilizer is highly inefficient in an indoor container situation for the same reason myco is - no active OM so none or insufficient populations of soil microorganisms to convert it into a plant usable form. Same with humic acid........can be beneficial in an outdoor garden setting but pretty much useless indoors. Save your money :-) And despite all manner of scientific literature to the contrary, the belief that adding Epsom salts somehow makes plants grow better/stronger/faster is a myth that resists being broken. Epsom salts - magnesium sulfate - is only of benefit if you have a magnesium deficiency. Period. And for any containerized indoor plant, that is easily addressed with a full range fertilizer. Save your money. Or save your Epsom salts for the bathtub soak to relieve the sore muscles you got while gardening outside :-))

all that is important is the numbers ... you really dont need to pay a premium for marketing mumbo jumbo ... buy the cheapest general formula water soluble fert.. and use it half strength... and your plants will be fine .. something like this but even better if you can find it in a plastic container https://www.walmart.com/ip/Expert-Gardener-All-Purpose-Water-Soluble-Plant-Food-Fertilizer-5-lb-Box/138006473?wmlspartner=wlpa&selectedSellerId=0&adid=22222222222143867852&wmlspartner=wmtlabs&wl0=e&wl1=s&wl2=c&wl3=74698135810751&wl4=pla-4578297704832965&wl5=&wl6=&wl7=&wl10=Walmart&wl11=Online&wl12=138006473_0amp;wl14=wlamart%20water%20sol%20fert&veh=sem&msclkid=33f541b281a81999841a210e4bc262fe&gclid=33f541b281a81999841a210e4bc262fe&gclsrc=3p.ds the only reason to fert often.. is if you water by completely flushing the pot after every watering .. and most of us dont water that way ... and if you dont flush.. and you keep fert'g .. then eventually fertilizer salts will accumulate in your pots ... to the plants detriment ... they are plants.. not children.. they dont need constant feeding .. and they surely dont need gourmet foods .. dont make this harden than need be ... ken ps: i presume a purchased plant comes heavily juiced on fert ... so i figure it doesnt need much of anything more for at least a month .. and then.. if i think of it.. i fert once a month at half strength ,... with the last fertg around 9/1 ...