Crocus 2015

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penstemon
Title: Member
Joined: 2010-06-24
Crocus 2015

Crocus time. Crocus niveus (VV.GR.1410), picture taken today. I guess it didn't feel like flowering when it was cold last month. 

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

Lovely!  We're having a big chinook melt but that kind of thing is only a temporary respite from winter weather here!

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

penstemon
Title: Member
Joined: 2010-06-24

It's 70F (21C) here. Still plenty of snow, especially the new melt-proof kind (a government conspiracy, of course), and it's supposed to snow later this week. 

 

Bob

extreme western edge of Denver, Colorado; elevation 1705.6 meters, average annual precipitation 30cm; refuses to look at thermometer if it threatens to go below -17C

Hoy
Hoy's picture
Title: Member
Joined: 2009-12-15

No snow here but rain and hail showers now and then. Not far from here though the ground is covered by 12-15 ft of snow!

The first crocuses show colour despite the lack of sun! But they don't open.

Trond Rogaland, Norway - with cool, often rainy summers  (29C max) and mild, often rainy winters (180 cm/year)!

penstemon
Title: Member
Joined: 2010-06-24

At least spring isn't very far off ...

Bob

extreme western edge of Denver, Colorado; elevation 1705.6 meters, average annual precipitation 30cm; refuses to look at thermometer if it threatens to go below -17C

RickR
Title: Moderator
Joined: 2009-09-21

I rarely get plants popping up while there is still snow on the ground because the ground is usually still well frozen.  But as the climate changes, this seems to be changing, too. I just checked the soil temp 7.25 inches down under 8 inches of melting snow (now at the end of a warm weather spell) and it is 32°F.

Rick Rodich    zone 4a.    Annual precipitation ~24 inches near Minneapolis, Minnesota, USA

penstemon
Title: Member
Joined: 2010-06-24

70 degrees in January is very typical weather for Denver. What's not so typical is the brevity of the warm spells. (Two weeks of 60-70F is more usual.) 

They say that climate change will affect more northerly latitudes first; the only thing I've noticed is a succession of bitterly cold snowy winters. There was a large Cedrus atlantica in west Denver which I admired for years; this year, after the sudden drop to -10F in November, the thing is completely brown. 

What's interesting to me is the hardiness of the leaves on Crocus niveus. (If rabbits don't eat them.) They're able to photosynthesize in Denver's hot winter sun (even if the air is cold), so they can manufacture the cryoprotective sugars, which suggests to me that the genus Crocus originated in colder climates and this hardiness is inherited. 

Bob

extreme western edge of Denver, Colorado; elevation 1705.6 meters, average annual precipitation 30cm; refuses to look at thermometer if it threatens to go below -17C

IMYoung
Title: Member
Joined: 2010-01-31
IRG 61 is a Crocus Special:  http://www.srgc.org.uk/logs/logdir/2015Jan291422555042IRG61.pdf (link is external)   
 Various Crocus are discussed and 3 new species are described
 
The latest article from  Dr. Jānis Rukšāns, describes various new Crocus species Crocus gunae, Crocus reinhardii  Crocus iranicus
 
Jānis is also a speaker at the SRGC Discussion Weekend in October   http://www.srgc.net/forum/index.php?topic=12742.0 (link is external)
 
Main page for all issues of International Rock Gardener e-magazine   http://www.srgc.org.uk/logs/index.php?log=international (link is external)
Up to date Index to IRG always available here http://www.srgc.net/forum/index.php?topic=9567.0 (link is external)
 
 Pic is of Crocus reinhardii corm
WHIR-120 corm reinhardii

Ian  and/or Margaret Young ( -here it is usually Margaret) Aberdeen , North East Scotland, UK Zone 8a

www.srgc.net

penstemon
Title: Member
Joined: 2010-06-24

Looked at the new IRG. I have room in the garden for all of these crocuses......

Bob

extreme western edge of Denver, Colorado; elevation 1705.6 meters, average annual precipitation 30cm; refuses to look at thermometer if it threatens to go below -17C

IMYoung
Title: Member
Joined: 2010-01-31

[quote=penstemon]

Looked at the new IRG. I have room in the garden for all of these crocuses......

[/quote]

 

My thoughts exactly, Bob.  We lost a lot of crocus bulbs the other winter,so  I have been suffering from serious bulb envy since then.  I  keep hoping that someone will think its a good idea to have an Aberdeen trial ground for such gems.

Ian  and/or Margaret Young ( -here it is usually Margaret) Aberdeen , North East Scotland, UK Zone 8a

www.srgc.net

penstemon
Title: Member
Joined: 2010-06-24

When gardeners in the U.K. lost bulbs during the winter, I remarked on the PBS list that bulbs themselves are not very hardy, and the small volume of soil in which they're growing, in pots, making them particularly vulnerable. Galanthus bulbs, say, are only hardy to about -10C. I first read this in The New Plantsman, and it sounded counterintuitive, to say the least, but it explained the constant failure of seed-raised calochortus here. The seed germinates; I have a lawn of calochortus seedlings in each pot; the pots are them left outside the following winter, and there are no calochortus the next spring. 

This went on for years until I read the article (can't find it now) and realized that a calochortus bulb might be hardy in a pot to -10C, but not to -30C. (Winters here are a little chillier than those in Scotland....) So the seedlings are planted in the ground, where the larger volume of soil keeps them much warmer. 

So, anyway, since I don't have much experience growing crocuses from seed, and it's an effort getting seed when it's available, do you think 25€ is too much for a single bulb? I'd need at least two of each, of course, but the dog needs his steak, too. 

Bob

extreme western edge of Denver, Colorado; elevation 1705.6 meters, average annual precipitation 30cm; refuses to look at thermometer if it threatens to go below -17C

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