We recently planted three young Manila palms. Two are doing well. Unfortunately, my gardener's assistant got to one before I got to him, and pruned off two browning fronds. Two of the remaining fronds have since mostly browned off, so it's left with one green frond and one budding frond that's not very well advanced.

I'm not sure if it will survive from here, but any advice on how to give it the best chance - watering, feeding etc?