What do you see on your garden walks? 2013

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Hoy
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Joined: 2009-12-15

The snowdrops have stood like this for about a month now but the snow has disappeared and come back several times. The last inch of snow came yesterday.

 

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

cohan
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Joined: 2011-02-03

They are waiting patiently!

west central alberta, canada; just under 1000m; record temps:min -45C/-49F;max 34C/93F; http://picasaweb.google.ca/cactuscactus  http://urbanehillbillycanada.blogspot.com/

bulborum
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For me it is amazing that around the bulbs
it seems to be warmer or they reflect the warmth ???

Roland

Facebook Group: https://www.facebook.com/groups/518187888211511
Normal Zone <8   -7°C _ -12°C      10 F to +20 F
RGB or RBGG means: Roland and Gemma de Boer

Novak
Title: Member
Joined: 2009-10-07

I can think of two explanations for the snow melted around the snowdrops. First, the plants will be actively metabolizing, which generates heat. Second, plants -- and anything else that isn't white -- will absorb more sunlight than the snow, causing them to be warmer. 

Janet
Philadelphia, Pennsylvania, zone 7a
Webmaster for the Delaware Valley Chapter (dvcnargs.org)

cohan
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Joined: 2011-02-03

I know nothing about whether the plants give off heat, but I can say for sure that any dark thing sticking out of the snow- soil, rocks, sticks, etc- will cause faster melting of the snow compared to undisturbed smooth white areas...

west central alberta, canada; just under 1000m; record temps:min -45C/-49F;max 34C/93F; http://picasaweb.google.ca/cactuscactus  http://urbanehillbillycanada.blogspot.com/

Hoy
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Joined: 2009-12-15

I think Janet's last explanation is the right one. They do indeed absorb heat also when it is cloudy. Even dead twigs get a similar area of no snow around them and they certainly have no metabolism ;)

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

bulborum
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Joined: 2011-02-01

Well whatever it is
It looks funny
I know Symplocarpus "produces " heat in the flower

Scilla cilicica collected in Cyprus at Smiyies start flowering here
also Scilla aristides and Leucojum vernum var. carpaticum

Roland

Facebook Group: https://www.facebook.com/groups/518187888211511
Normal Zone <8   -7°C _ -12°C      10 F to +20 F
RGB or RBGG means: Roland and Gemma de Boer

Anne Spiegel
Title: Member
Joined: 2010-01-26

Michael, I just visited your Lewisia and alpines site.  What a feast for a new englander midst snow and cold!  Your pictures are superb and I loved the Daphnes you showed.  I noticed almost everything seemed to be in pots.  Do you grow these (Lewisias, daphnes) outside as well?  What is your usual minimum temperature?

Michael J Campbell
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Joined: 2011-01-31

Quote:

Do you grow these (Lewisias, daphnes) outside as well?  What is your usual minimum temperature?

I live in town and  don't have a very big garden so about 60%of my plants are grown in pots. I have both Daphne and Lewisias planted out in a scree bed and some Daphne's in the shrub border.see pic below of one in a scree bed.
Winter temperatures from about -5°C to +14°C (  23°F to  57°F)  summer temperatures from +16 °C to 24°C (60.8 °F to 75.2°F) Annual rainfall 1000-1400 mm  (40-55inches)

Daphne x susannae cheriton

Michael J Campbell in Shannon, County Clare, Ireland

http://www.facebook.com/michael.j.campbell.395

Lewisias, alpines ,South African bulbs
http://picasaweb.google.co.uk/michaelJcampbell63

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

bulborum wrote:

Well whatever it is
It looks funny
I know Symplocarpus "produces " heat in the flower

Roland

Yes, some plants do, I know, but I think they produce heat to mimic rotten meat and attract insects. But I checked yesterday and the thawed circles are much bigger around snowdrops than around anything elseincluding crocuses except Cardamines ;) However I didn't meassure the temp.

Michael, what a nice and tidy plant!

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

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