My emersed planter box

I started my emersed planter box in February 2008 with some emersed Echinodorus and Cryptocorynes bought from Teo farm. The potting mix was formed with a packet of Horti Soil (lower layer) and a packet of garden soil (upper layer) bought from NTUC. As compared to my emersed tank, this planter box sitting in my balcony has more luck with flowering cryptocorynes.

C. pontederiifolia

Unknown sp. bought from Teo farm, possibly a varient of C. wendtii?