Normally, I buy plants from my lfs but decided to try one of the tube plants from Petsmart (an experiment). I bought a windelov java fern a month ago and tied it to a piece of driftwood. One leaf melted and the rest of the plant has been green. There has been no new growth since then. It merely exists in the tank. The red flame sword, tiger lotus, and duckweed are all growing. Do windelov java ferns really grow this slow?