When watering cannas how much do they need?
Firstly cannas are fairy drought tolerant, meaning that they dont need a lot of water.
Established clumps will only need a good soaking every two weeks or so through summer to keep them in good condition.
When potting up or planting in the open ground give them a good watering in and leave them for a few days to a week for them to resettle and throw out new feeder roots, you will know when they have as by giving the plant a gentle tug you will feel its re-rooted.
With small young plants its essential to remember not to overwater them through the winter if you get a few days that are warm and sunny, then feel for moisture in the soil and if they are dry you can give them a drink.
If your climate has cold frosty winters then above growth will slow down or completely stop, but the rhizome will keep producing new eyes, when these new eyes appear early spring, you can then water till your heart’s content.
In ground plants I dont water at all over winter, I start watering in early spring.
I find by wetting and watering cannas on their leaves it gives them a quick pep up, I’m always amazed by cannas and how incredibly tough these water wise plants are. My grey water from the laundry also gets pumped out onto the garden.
A sign that established cannas are a bit thirsty is that their leaves will partly fold a little bit inwards.
Cannas that are really thirsty and in dry soil will easily burn and singe to brown on the tips of their leaves.
I dont water all parts of my garden, due to the lack of water in my area in Victoria Australia, a few plants haven’t been watered for years, it was roughly around 2004 that they got their last drink from a hose, sure they dont flower as much and they dont get as tall but these tough perennial plants are still there.