Perfect growing conditions banana, canna

Mine do well and have:

Shelter, part sun (that's because of the shelter, full sun might be preferable), well drained (I put land drains in - heavy clay here). They get a reasonable amount of water during the Summer (pond alongside into which I dip a bucket and "chuck" it on plants that need water). I pee on the Bananas about once a week - so they get some nitrogen. Lawn fertiliser (without any Weed part) would do - that's "Weed" as in "Herbicide", not as in "past tense of To Wee"

 

I plant with chicken pellets - some in the planting hole below the rootball, some around it when almost backfilled (so that covered by soil, just, rather than on-surface).

When I fertilise "draught" I spread it about a bit - sorry, probably too much information for the ladies already!. I have a bucket under the spout of the IBC nearby and if the plants need water than I combine with water in the bucket and then water from that.

At the moment I am fertilising some new clumps of Bamboo. They are getting a bucket of water a day, but I am fertilising at various times of the day not coinciding with the watering - but the ground is moist.

Never had a problem with fertilising mature-ish plants direct. I did, however, have a Bamboo that I bought in a half-barrel. It sat on the terrace outside the back door all winter, waiting for planting position to be ready the following Spring. In early Spring I pee'd on it every night when I took the dogs out and after a few weeks it definitely was not happy! I doubt that got watered anything like enough though ...