The DU Lounge
Related: Culture Forums, Support ForumsAnd now for a barbarism of the botanical variety: Calling garden botanists, Re, canna plants
Only have had them for a couple of years, always liked them at a distance over decades without knowing what they are like. So first lesson, they are one of those water guzzlers and spreaders, like "elephant ears" and all those leafy tender things, fine. Second lesson, blooms crown the top of very tall, goofy bare stalks, O.K. fine. Third lesson, they need to be "dead-headed" after the blossom poops out, the ball (seed?) needs to be snapped off to allow its energy to channel over to the twin blossom next to it, fine.
So, after the pooping off of a bloom, that stalk is never going to blossom again, so I spent the next year shearing off the upper half of the stalk, leaving the bottom half all leafy and increasingly thick. Plus like with those water guzzlers, these multiply like heck, developing into an ever larger patch in square area and crowdedness. They freeze in Winter unless one of those dedicated gardeners do the thing with the rhizome extravaganza (not me). So frozen, sheared down to the ground leaving the view naked - but no fear, they spring right back in the Spring.
**** The point of this barbarity: After shearing the post-bloom stalks halfway down, leaving ever crowded leafy bottom halves and dead nubs where the blooms were, I have started (now) cutting all of those down-stalk halves at ground level, to thin out the patch. Am willing to hear schooling, but not excessive castigating. Disclaimer, the pic below is from google, but resembles my patch.

Phoenix61
(18,507 posts)I stopped planting them years ago due to high water needs. Im on the gulf coast and I swear I could leave the hose running on them and watch them dry out.
UTUSN
(74,959 posts)ailsagirl
(24,270 posts)
UTUSN
(74,959 posts)The pic is from google but look like mine.
Mine and i have been through a lot - hornets, snails, moths that chewed them to shreds, freeze. Me sometimes not in the mood to deadhead them. Am thinking the thinning out will make things easier.
ailsagirl
(24,270 posts)they're gorgeous!! My dad planted them in our back yard and I always admired them. As I recall, some were red, others yellow.
Thanks for the memories
👍👍
LudwigPastorius
(13,037 posts)Pain in the ass, they are.
UTUSN
(74,959 posts)wyn borkins
(1,372 posts)I planted (new to the area) cannas in several neat rows just in front of taller flowering plants. Soon (as in way-to-soon), those durn cannas took-over everything.
I had to dig-out (to a 2-foot level) the entire flowering garden area in an 'attempt' to eradicate them. Even though I no longer live there, those cannas have returned with fury.
Now-a-days, if I wish to see cannas, I refer to the Internet...
UTUSN
(74,959 posts)Like you many years ago when I began my very small and very superficial taste of gardening, my first law was to get rid of anything with thorns, with your same principle that if I want to see such plants i will look at pictures.