Posted by Chris Hogg on July 28, 2011, 10:58 am
I want to sow some of my Stipa pulcherrima seeds (see earlier post). I
know from past experience that if sown now, they won't germinate until
next spring, implying they need a cold spell to trigger the process,
i.e. stratification. I would like to speed it up, and intend putting
the potted seed into either the fridge at say +4 deg. c. or in the
freezer at -18 deg. c., probably both as I have quite a lot of seed.
But does anyone know which is most likely to be successful, and how
long should I leave them in there?
If no specific answer, then in general terms for how long do people
leave seeds in the fridge or freezer to simulate winter, and how cold,
fridge temperatures or freezer temperatures?
--
Chris
Gardening in West Cornwall overlooking the sea.
Mild, but very exposed to salt gales
Posted by Charlie Pridham on July 29, 2011, 3:53 am
>I want to sow some of my Stipa pulcherrima seeds (see earlier post). I
> know from past experience that if sown now, they won't germinate until
> next spring, implying they need a cold spell to trigger the process,
> i.e. stratification. I would like to speed it up, and intend putting
> the potted seed into either the fridge at say +4 deg. c. or in the
> freezer at -18 deg. c., probably both as I have quite a lot of seed.
> But does anyone know which is most likely to be successful, and how
> long should I leave them in there?
> If no specific answer, then in general terms for how long do people
> leave seeds in the fridge or freezer to simulate winter, and how cold,
> fridge temperatures or freezer temperatures?
> --
> Chris
> Gardening in West Cornwall overlooking the sea.
> Mild, but very exposed to salt gales
I put sown seed in sealed plastic bags at the bottom of the fridge for 4-6
weeks
--
Charlie, Gardening in Cornwall
Holders of National Collections of Clematis viticella
and Lapageria rosea cvs
http://www.roselandhouse.co.uk
Posted by Christina Websell on July 29, 2011, 3:05 pm
>I want to sow some of my Stipa pulcherrima seeds (see earlier post). I
> know from past experience that if sown now, they won't germinate until
> next spring, implying they need a cold spell to trigger the process,
> i.e. stratification. I would like to speed it up, and intend putting
> the potted seed into either the fridge at say +4 deg. c. or in the
> freezer at -18 deg. c., probably both as I have quite a lot of seed.
> But does anyone know which is most likely to be successful, and how
> long should I leave them in there?
> If no specific answer, then in general terms for how long do people
> leave seeds in the fridge or freezer to simulate winter, and how cold,
> fridge temperatures or freezer temperatures?
> --
I have a "big blue book" that I occasionally write interesting info in that
I have come across, all types of things from recipes to useful tips, how to
make John Innes etc. I know that I made a list of stratification times for
various seeds in there. Would you like me to look it out and post these
for you? Can't promise Stipa is on the list, but it may be helpful for
other seeds.
Tina
Posted by Chris Hogg on July 29, 2011, 3:41 pm
On Fri, 29 Jul 2011 20:05:25 +0100, "Christina Websell"
>>I want to sow some of my Stipa pulcherrima seeds (see earlier post). I
>> know from past experience that if sown now, they won't germinate until
>> next spring, implying they need a cold spell to trigger the process,
>> i.e. stratification. I would like to speed it up, and intend putting
>> the potted seed into either the fridge at say +4 deg. c. or in the
>> freezer at -18 deg. c., probably both as I have quite a lot of seed.
>> But does anyone know which is most likely to be successful, and how
>> long should I leave them in there?
>>
>> If no specific answer, then in general terms for how long do people
>> leave seeds in the fridge or freezer to simulate winter, and how cold,
>> fridge temperatures or freezer temperatures?
>>
>> --
>>
>I have a "big blue book" that I occasionally write interesting info in that
>I have come across, all types of things from recipes to useful tips, how to
>make John Innes etc. I know that I made a list of stratification times for
>various seeds in there. Would you like me to look it out and post these
>for you? Can't promise Stipa is on the list, but it may be helpful for
>other seeds.
Thank you for that offer Tina, yes it would be very helpful. If you
can't find Stipa, other grasses might be similar, although don't spend
too much time hunting.
--
Chris
Gardening in West Cornwall overlooking the sea.
Mild, but very exposed to salt gales
Posted by Christina Websell on July 29, 2011, 5:00 pm
> On Fri, 29 Jul 2011 20:05:25 +0100, "Christina Websell"
>>
>>>I want to sow some of my Stipa pulcherrima seeds (see earlier post). I
>>> know from past experience that if sown now, they won't germinate until
>>> next spring, implying they need a cold spell to trigger the process,
>>> i.e. stratification. I would like to speed it up, and intend putting
>>> the potted seed into either the fridge at say +4 deg. c. or in the
>>> freezer at -18 deg. c., probably both as I have quite a lot of seed.
>>> But does anyone know which is most likely to be successful, and how
>>> long should I leave them in there?
>>>
>>> If no specific answer, then in general terms for how long do people
>>> leave seeds in the fridge or freezer to simulate winter, and how cold,
>>> fridge temperatures or freezer temperatures?
>>>
>>> --
>>>
>>I have a "big blue book" that I occasionally write interesting info in
>>that
>>I have come across, all types of things from recipes to useful tips, how
>>to
>>make John Innes etc. I know that I made a list of stratification times
>>for
>>various seeds in there. Would you like me to look it out and post these
>>for you? Can't promise Stipa is on the list, but it may be helpful for
>>other seeds.
> Thank you for that offer Tina, yes it would be very helpful. If you
> can't find Stipa, other grasses might be similar, although don't spend
> too much time hunting.
I don't think it will help you with your stipa but this is what I have:
Barberries (barberis spp) 1-3 months
Blazing stars (Liatris spp) 4 weeks
Bleeding Heart (Dicentra spectabalis) 6 weeks
Clematis 3 months
Columbines (Aqualegia spp) 3 weeks
Day lilies (Hemerocallis spp) 6 weeks
Firs (Abies spp) 2-3 months
Honeysuckle (Lonicera spp) 1-2 months
Hornbeams (Carpinus spp) 3-4 months
Lilacs (Syringa spp) 1-3 months
Lobelias 12 weeks
Maples (Acer spp) 2-4 months
Monkshood (Aconitum carmichaelii) 3 weeks
Primroses (primula spp) 4 weeks
Roses (rosa spp) 4-5 months
Book says you can simulate winter by covering the seed with damp peat moss
and refridgerating between 32 & 45 for the specified time.
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> know from past experience that if sown now, they won't germinate until
> next spring, implying they need a cold spell to trigger the process,
> i.e. stratification. I would like to speed it up, and intend putting
> the potted seed into either the fridge at say +4 deg. c. or in the
> freezer at -18 deg. c., probably both as I have quite a lot of seed.
> But does anyone know which is most likely to be successful, and how
> long should I leave them in there?
> If no specific answer, then in general terms for how long do people
> leave seeds in the fridge or freezer to simulate winter, and how cold,
> fridge temperatures or freezer temperatures?
> --
> Chris
> Gardening in West Cornwall overlooking the sea.
> Mild, but very exposed to salt gales