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Swainsona from seed

Posted by karl_a ACT Aust (My Page) on
Mon, May 29, 06 at 0:05

Hi All,
I collected some swainsona (darling pea) seed a year ago and have been trying to grow it since.

Initially, I started in late spring using the standard chipping and hot water soak methods. Both failed to produce seedlings which I put down to lack of sterility in the potting mix. But even after sterilising the soil, germination was still at 100% failure. So I gave up as a hot summer was pressing in.

Now I'm at it again using this method (because i've got very few seed left). 1)bleach sterilise seed 2)scarify, 3)Sow onto moist sphagnum in a jar, 4)put in a shady spot outside.

This has worked well with 100% germination in 2 weeks despite the cool temperatures (I'm in the ACT where currrently the day temps are 16oc with 0oc at night and its getting colder).

I've now sown them out into pots and three have put up their seed leaves. Yay! Now the next challenge is to nurse them through a Canberra winter (max -7oc)!

My question are.
In Canberra most endemic peas come up in late Autumn and then sit there all winter with about two leaves before growing away in the spring, is this the darling peas natural cycle also?

How cold tolerant are they? It gets to -7 in Canberra.

What are other peoples general experiences with growing swainsona species? I'm pretty sure I'm making it hard for myself.

regards
Karl


Follow-Up Postings:

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RE: Swainsona from seed

Hi Karl,
Have you thought about a cold frame where they can be protected from the extreme cold, but still get warmth and sunlight.
As an interim measure I'd try and make something to get them through the Canberra winter eg. until October at least.


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RE: Swainsona from seed

Hi Ya,
If forced to I've got a heated unit and my patio rarely frosts. Although space is always a premium in winter as I do most of my cuttings in late autumn and winter. I've got the materials to build a bigger unit I just need to find the time somewhere!

I just read on the web that mature plants will survive in Canberra but the tops do get crisped by the frost and the whole plant should be cut back to the stump in spring after the forst to promote new growth. I guess I'll have to keep them sheltered until they harden off and plant them out in the spring. But at least they will survive the cold.

ciao
Karl


 
 

 

 


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