They're called "Angel's fishing rods" - the Latin name is Dierama. As you mention seed are you growing them from seed? All I know is that they like well drained soil. A friend has them self-seeding in a gravel garden.

They're proper name is Dierama and you'll be pleased to know that they don't require any special treatment !!!!
They're a perennial so they'll die back in the winter but their roots will still be alive and they'll start sending up shoots in the spring.

They certainly don't need to be in a greenhouse they want to be outside, in the open ground in a fairly sunny spot - that's it !
If you put them in the greenhouse and mollycoddle them they'll become 'soft' - they're tough, so plant them out.

Ah, seeds .... well done Beattie ...
I'll let a seed person answer but once they're 'up' treat them as i've described.

I,ve always thought that dierama were not particularly hardy, only down to about minus 5 centigrade, if i,m wrong I,ll get some myself as I like the look of them
derekm

hi the seeds are slow growing.i planted twenty in a propagator in jan of this year and only got three out of them and even now they are only about six inches tall.and in a 3inch pot so sow plenty to be safe.if and when they do grow/when you transplant them be very carefull with the roots they are very fragile when small good luck.

According to the RHS website, seed grown plants will take at least 5 years to get to flowering size.

also i forgot to add when they do appear they look like blades of grass so be wary good luck.

I can say with authority that they're hardy down to minus 12.
We had that temperature here last winter and mine came through unscathed.

Thanks for that louise, but our lowest temp last winter was minus 22c so I don,t think I,ll bother, I think that may be just a bit too mch for them. derekm

Yes, DO bother with them - just lift the plant and pot it, keep it somewhere cool and plant it out in the early spring.
Or, grow it in a decent sized pot and then you don't have to lift it each year.
If you like them HAVE them, don't be put off by such minor obstacles.

I think you have to be realistic about the amount of bother you're prepared to go to for your plants. It's OK when you're young and fit or enthusiastic and have time to manage lots of plants that need coddling. If you're short of time, or not able to get out when it's getting colder, or plain lazy like me, it's better to acknowledge it and not buy something that's INEVITABLY going to peg out in the first winter. (Unless it's cheap and intentional, like bedding plants)

I've done with knowingly buying something that needs time and attention that I just know I won't give it - then it dies - then I feel guilty.

I'm taking the easy option every time now, & no guilt.

Yes, you have to be realistic.

I,m with Beattie on this one lol, it wouldn,t have bothered me 40 years ago, but as you get older you don,t have the same enthusiasm for extra work, so I,ll just have to wait for global warming. derekm