I won't be holding my breath waiting or those berries to ripen. They're still green and hard.
My C. merkusii is doing better now. I raised it up so that it floods less now. Besides that, this wet season has been very poor and rainfall is right down. This February I got 129 millimetres, last February I got 781 millimetres. My second merkusii is going into a large tub sunk into the ground. Water level there will be low and constant. It will be in mostly shade for a lot of the day. The johnstonii has been getting knocked around by falling palm fronds. I've finally found a better spot so it's coming good now. Maybe it'll flower soon.
Are you sure your merkusii flowers in the summer? My C cupidispathum flowered end of autumn and most of winter. Photos I took of C johnstonii in Cairns were during early winter. I just wonder whether they all flower around that time. We're early autumn here now so I'm hoping to get flowering soon.