From seed, yes, up to 5 years - quickest I've had one flowering from seed is 3 years. I bought a lovely potted Dierama 'Blackbird' from Woottens, planted it in autumn and it flowered the following summer.
A trowel in the hand is worth a thousand lost under a bush.
Thank you for your reply. I bought the beautiful 'Blackbird' in 2019 that has disappeared also I have 3 of the pale pink variety I have had for 2 years now with no sign of it flowering. Saw the lovely Dierama on TV last night and I'm so very envious, I really want to get one with actual flowers.
It may be the local growing conditions - Dierama are really fussy and I've lost a few. They hate drying out and if they do, it will put them back for a year. They also hate soggy ground and will rot. Basically, they are the archetypal "Need full sun and humus-rich, moist but well-drained soil" type of plant, and they really mean it this time.
A trowel in the hand is worth a thousand lost under a bush.
Aaargh! I have two Dierama 'Blackbird' which are in beds opposite each other and I'm sure they make a pact every Spring along the lines of - "Lets come up all perky and tease her into thinking this is the year'! I've had them four years, bought in pots as tiny little things. One throws up only one flowering stem each year - and I suspect the second one just looks on and thinks 'Nope, not for me, not in the mood'.
Every time I think I ought to dig them out - I decide against it thinking 'Well, maybe I'll get a surprise this year'. It's a stand-off - me and them and I'm at the stubborn stage where I'm game to wait another year. I suspect it has to be that I've goofed with the conditions. They do tend to have a bit of brown-ness at the soil level on some of the shoots which I've wondered if it's winter wet rotting them a bit maybe. It's beyond me what the solution could be but, can't bring myself to dig 'em up - just in case!
Posts
Every time I think I ought to dig them out - I decide against it thinking 'Well, maybe I'll get a surprise this year'. It's a stand-off - me and them and I'm at the stubborn stage where I'm game to wait another year. I suspect it has to be that I've goofed with the conditions. They do tend to have a bit of brown-ness at the soil level on some of the shoots which I've wondered if it's winter wet rotting them a bit maybe. It's beyond me what the solution could be but, can't bring myself to dig 'em up - just in case!
I live in west central Scotland - not where that photo is...
Have you moved it? Don't think they like that.
Dead brown bits...completely normal you will have to learn to live with that.
Be patient they may well still flower in July.
Worth the wait.