Roscoea 2013

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Longma
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Joined: 2012-11-19
Roscoea 2013

I know there is interest amongst some members of this forum for Roscoea sp. I thought I'd kick off the season with this purple form of R. cautleyoides .

Longma
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Joined: 2012-11-19

This unusual coloured flower of R. humeana appeared recently as a 'first time flowering from seed plant'. The 'typical coloured form' is on the left.

53.69° N, Dedicated to West Coast Fritillaria, plus three other members of the subgenus Liliorhiza. I grow other Genera, as time permits !

Lori S.
Title: Moderator
Joined: 2009-10-27

Very nice!  Wish I could grow Roscoea here... and have tried... but none seems hardy enough, unfortunately.  Where abouts are you located (country, zone)?

Lori
Calgary, Alberta, Canada - Zone 3
-30 C to +30 C (rarely!); elevation ~1130m; annual precipitation ~40 cm

ronaldo
Title: Guest

Hi Lori. We ( my wife Nora and I ) garden in the North East of England, on the coast of East Yorkshire.  We experience down to - 10'c  in winter and up to 25'c in summer. Records show that this area receives around 600 mm annual rainfall, but we are situated very close to a large river system that seems to draw most of the rain to it, so our garden possibly only receives 100 to 150 mm per year. This can however fall at any time of the year!

We have found that the key ( here ) to growing Roscoeas is to avoid wet and cold. We had a particularly bad ( for us) winter a few years ago ( temps down to -20'c ), and we lost thousands of Roscoeas that were growing in pots in free draining compost that had gotten wet during mild rainy spells. However the same species in the pots that remained dry survived and grew well. All of the plants in the garden in raised beds of almost pure grit, survived perfectly. Now as soon as the seed raised plants reach flowering size, ( two to three years ), they go into deep beds of grit the next Spring ( having been washed, dried and stored in plastic bags with vermiculite over winter ).  We have found that Roscoeas must be grown very very hard. Any " goodness" in the soil leads to lush straggly growth and "soft" plants that don't survive well. Our medium in the raised beds is 90% grit, 10% soil. Over time the beds become very impoverished and this is to the good of the plants. R. scillifolia scillifolia and R. scillifolia atropupurea are incredibly tough small plants and an excellent duo to start with for anyone.  Whilst I'm rambling on, I think its also worth mentioning that dried seed ( as from the seed banks ) germinates well after a good soaking, but fresh seed comes almost 100%. Some species produce so much seed they can become a little bit weedy!

This is our experience in our conditions. Many people on this Forum grow them well also, and I'm sure under different conditions, and with different approaches.

Longma
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Joined: 2012-11-19

The above post is from me but unfortunately it posted as my alter ego ! and now I can't edit it! The information still holds good though. :)

53.69° N, Dedicated to West Coast Fritillaria, plus three other members of the subgenus Liliorhiza. I grow other Genera, as time permits !

Mark McD
Title: Moderator
Joined: 2009-12-14

Ron, you'll probably need to log out then log back in as Longma, otherwise your new messages are listing the user as "ronaldo (not verified)".

Mark McDonough
Massachusetts, USA, near the New Hampshire border USDA Zone 5
antennaria at aol.com
 

Longma
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Joined: 2012-11-19

Absolutely correct Mark. Thanks again.

53.69° N, Dedicated to West Coast Fritillaria, plus three other members of the subgenus Liliorhiza. I grow other Genera, as time permits !

Longma
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Title: Guest
Joined: 2012-11-19

We're very pleased with this batch of R. cautleyoides. Flowering for the first time from our own seed, the plants are approx. 4" high and of a good rich colour.

53.69° N, Dedicated to West Coast Fritillaria, plus three other members of the subgenus Liliorhiza. I grow other Genera, as time permits !

Mark McD
Title: Moderator
Joined: 2009-12-14

Fantastic colorful form! Is the plant really just 4" tall, I would have guessed it's somewhat taller.  Nonetheless, a real beauty.

Mark McDonough
Massachusetts, USA, near the New Hampshire border USDA Zone 5
antennaria at aol.com
 

Longma
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Title: Guest
Joined: 2012-11-19

Its just the perspective giving that impression Mark. The grit bed is slightly raised, so they seem higher off the ground in that picture. Maybe they are a touch over to the top of the flowers :) . Here's a lonesome singleton from further down the slope, ( plus scale :) ).

I expect the leaves will eventually also reach around 4", but will remain tough and leathery.

53.69° N, Dedicated to West Coast Fritillaria, plus three other members of the subgenus Liliorhiza. I grow other Genera, as time permits !

Mark McD
Title: Moderator
Joined: 2009-12-14

Thanks Ron, the red stem (or perianth sheath?) sets off the buttery yellow flowers, you have a real winner there.  I know there are a number of named forms of Roscoea, are you looking to introduce some of your better selections?  This one would surely be a hit, and of rock garden proportions too.

Mark McDonough
Massachusetts, USA, near the New Hampshire border USDA Zone 5
antennaria at aol.com
 

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