Hi all,

I bought P. superbum (been looking for a small one for 2 years) almost exactly one month ago. I got my first fern last year (a medium sized P. bifurcatum) and now I'm addicted--I'm sure most of you can empathize, as I now have 5 of them. The superbum has grown quickly over the last 20-some days (I will post pictures below), the bifurcatums quite a bit slower.

My question is, what is the best method of fertilization? Foliar feed or with water as normal? I have to soak my largest in my bathtub, as the board it's mounted on is 12"x12". Also, it is my understanding that P. superbum requires high calcium and potassium levels to produce the gorgeous, large nest fronds. What fertilizers work best for this? I only use a 20-20-20 for my orchids on occasion (really sporadically, usually just when I remember or feel like spending an extra 15 minutes watering my 70-something houseplants).

Any advice/experience with this genera is appreciated! This plant was much-anticipated for me, so I want to help it thrive. Thanks in advance!