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Author Topic: Calandrinia affinis  (Read 817 times)

Mike P

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Calandrinia affinis
« on: January 20, 2021, 07:58:03 AM »
Hi
Does anyone have any tips for germinating these.
Thanks
Mike

Gerdk

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Re: Calandrinia affinis
« Reply #1 on: January 20, 2021, 08:58:26 AM »
Hi
Does anyone have any tips for germinating these.
Thanks
Mike

Only that I wasn't able to have any germination from more than 50 wild collected fresh seeds sown in spring.
Seems difficult.

Gerd
Gerd Knoche, Solingen
Germany

Mike P

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Re: Calandrinia affinis
« Reply #2 on: January 20, 2021, 06:28:29 PM »
Thats what worried me. Im going to try cold stratification in the fridge.

Maggi Young

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Re: Calandrinia affinis
« Reply #3 on: January 20, 2021, 08:38:03 PM »
Some  info on  other Calandrinia germination here: https://onrockgarden.com/index.php/germination-guide/germination-guide

Calandrinia grandiflora          A                
Sow @ 20C. Seed germinates within 3 months
Calandrinia sp.          K                *   
N Sow directly in the garden. Sow at 10C. * resents disturbance, perhaps fall planting
Calandrinia umbellata          A                
Sow @ 20C. Seed germinates within 3 months



GERMINATION CODES ONTARIO ROCK GARDEN & HARDY PLANT SOCIETY     
WHAT OUR TEMPERATURE DESIGNATIONS MEAN
 4C Either place seeds outdoors to be exposed to a wide range of winter temperatures including freezing or put them in a refrigerator (not a deep freezer).
10C Either place seeds outdoors in spring or fall or choose a very cool indoor location.
20C Either place seeds in a sheltered outdoor location in mid to late spring or grow at room temperature.
SYMBOLS
*This species needs special care as described.
? We have no information on the germination of this species. We sometimes provide an educated guess about which approach you should try.  Let us know what is successful.!Sow immediately. The viability of these seeds is short or the species propagates best with fresh seed. Stored seed might be coaxed into germination with temperature cycling and patience.

LETTERS
A Sow @ 20C. Seed germinates within 3 months.
B Sow @ 20C. If seed does not germinate within 3 months, try 4C for 1-2 months, then20C again.
C Sow @ 20C for 3 months, then place @ 4C for 3 months.DUse repeated cycles of 20C, then 4C for 3 months each. Germination is very prolonged.
E Sow @ 20C for 6 weeks, then place @ 4C for 6 weeks, then slowly raise temperature to 10C for 6 weeks. If there is no germination, repeat the cycle.
F Sow @ 4C.GSow @ 4C for 3 months, then place @ 20C for 3 months.
H Use repeated cycles of 4C, then 20C for 3 months each. Germination is very prolonged.
J Sow @ 4C for 3 weeks, then place @ 20C.
K Sow @ 10C.
L Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.
M Store seed in moist medium @ 4C for 3 months, then @ 20C until radicle appears. Repeat cycle until leaf appears.
N Sow directly in garden.

NUMBERS
1 Resents transplanting.
2 Requires darkness.
3 Requires light or the small seeds should be surface sown.
4 Germination is improved by using GA3.
5 Germination is successful only when GA3 is used.
6 Requires scarification. Nick or rub between sheets of sandpaper.
7 Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and water used for soaking.
8 Pulpy coat inhibits germination. Remove by soaking and rinsing in clean water daily for 7 days. Discard water.
9 At one time, we advised "Tails may inhibit germination. Remove them." The advice applied primarily to pulsatillas and clematises. Our most recent data indicates that leaving the tails on has no effect on germination
« Last Edit: January 20, 2021, 08:42:33 PM by Maggi Young »
Margaret Young in Aberdeen, North East Scotland Zone 7 -ish!

Editor: International Rock Gardener e-magazine

erekose

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Re: Calandrinia affinis
« Reply #4 on: March 13, 2022, 09:25:42 AM »
Ok so here we are a year later and guess what -Three germinated last week

Mike P

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Re: Calandrinia affinis
« Reply #5 on: March 13, 2022, 06:15:03 PM »
Thanks Maggi Im now back as me.


Maggi Young

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Re: Calandrinia affinis
« Reply #6 on: March 13, 2022, 06:39:23 PM »
 8) ;D :D
Ok so here we are a year later and guess what -Three germinated last week



Thanks Maggi Im now back as me.

Margaret Young in Aberdeen, North East Scotland Zone 7 -ish!

Editor: International Rock Gardener e-magazine

Mike P

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Re: Calandrinia affinis
« Reply #7 on: March 16, 2022, 07:21:10 AM »
Now five germinated. Looks like two cold spells and a warming summer did the trick. Lets hope they grow on.

MarcR

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Re: Calandrinia affinis
« Reply #8 on: April 06, 2022, 04:58:32 AM »
Mike,

I know it has been a long time since you posted this; but I wasn't here then.

If you are still interested, you might try this.

mix KNO3 with water at 1/4 tsp/liter. and dip the seeds in a small dish of solution for 3 min

Put some seed starting mix in a ziplock bag and add 1/2 tsp crushed dolomite.

sow your seeds in the bag and put it in a window at 20C with filtered light for 90 days.

Transfer the bag to your refrigerator at 4C  and watch for sprouted seeds which should be removed and planted.
Marc Rosenblum

Falls City, OR USA

I am in USDA zone 8b where temperatures almost never fall below 15F  -9.4C.  Rainfall 50"+  but none  June-+September.  We seldom get snow; but when it comes we get 30" overnight.  soil is sandy loam with a lot of humus.  Oregon- where Dallas is NNW of Phoenix.

 


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