storing Crinum seed

Joe Shaw jshaw@opuntiads.com
Thu, 28 Sep 2006 15:55:22 PDT
As far as I can tell you can't really store crinum seed at  all. I suppose 
it depends on how you define 'store'.

++++++++++++++++++++++++

We regularly store crinum seeds in the refrigerator.  They are put in  > 
ziptop plastic bags, labeled, and put in the fridge.  The temperatures run 
somewhere around 39?F  or +4?C.  The seeds will normally germinate during 
this time.

==========================



Hi Gang,



I enjoyed the notes from the two Jims.  I have to agree with their general 
consensus that Crinum seeds don't exactly "store" in the same way that many 
seeds will store.



Crinum produce recalcitrant seeds; this means that they are not orthodox 
seeds.  Perhaps more than 70% of plant species produce orthodox seeds. 
Orthodox seeds can continue to dry after maturation and can often be stored 
for many years if kept cool and dry.  They can lose lots of water content 
and remain viable (e.g., corn).



LINK:  Orthodox and Recalcitrant Seeds (article by P. Berjak and N.W. 
Pammenter)

http://rngr.net/Publications/ttsm/…



Recalcitrant seeds generally have a limited shelf life and Crinum seed can 
last for months before being planted, sometimes 6-8 months (especially for 
big seeds, walnut-sized seeds).  I have not generally tried to store Crinum 
seed; it just germinates when it wants to.  Storage of extra small Crinum 
seeds is risky; some hybrid-type seed can be very small for Crinum, and such 
seed needs to be planted as soon as you can.  Interestingly, it seems to do 
no good to open a Crinum seed pod prematurely; seeds taken early seem to 
fail more often than not.



Sometimes, if seeds are produced in fall, I have planted them and they have 
remained quiescent until spring.  When temperatures warmed a bit, and days 
got longer, the seeds germinated (C. asiaticum, C. pedunculatum, C. 
erubescens).  I sent some Crinum bulbispermum Jumbo seeds to an email friend 
overseas and they took about 2 months to get there because I sent them book 
rate.  The seeds had mostly germinated, but being Crinum some of them made 
little plantlets that could be rescued.



I've been afraid to refrigerate seeds and am happy to hear that Jim S. has 
had good luck with that approach.  Surely, coolness slows down the urge to 
germinate and must help prolong general shelf life (just like a head of 
lettuce).  I've just been reticent to try refrigeration for Crinum seeds.



QUESTION for Jim S.

-----------------------------

Have you stored many types at 4 C; do tropical Crinum seeds accept 
refrigerator conditions?



NOTE:

-------

Just when you want Crinum seeds to germinate, some will  "store themselves" 
and take and extra 2-4 months to germinate, even when conditions seem 
optimal.  Go figure.







Cordially,



Joe

The "second spring" of the year is here.  Temperatures often remain pleasant 
and above freezing until mid-November or even early January.  Rainlilies 
really grow during this not-too-hot time.
As far as I can tell you can't really store crinum seed at  all. I suppose 
it depends on how you define 'store'.

++++++++++++++++++++++++

We regularly store crinum seeds in the refrigerator.  They are put in  > 
ziptop plastic bags, labeled, and put in the fridge.  The temperatures run 
somewhere around 39?F  or +4?C.  The seeds will normally germinate during 
this time.

==========================



Hi Gang,



I enjoyed the notes from the two Jims.  I have to agree with their general 
consensus that Crinum seeds don't exactly "store" in the same way that many 
seeds will store.



Crinum produce recalcitrant seeds; this means that they are not orthodox 
seeds.  Perhaps more than 70% of plant species produce orthodox seeds. 
Orthodox seeds can continue to dry after maturation and can often be stored 
for many years if kept cool and dry.  They can lose lots of water content 
and remain viable (e.g., corn).



LINK:  Orthodox and Recalcitrant Seeds (article by P. Berjak and N.W. 
Pammenter)

http://rngr.net/Publications/ttsm/…



Recalcitrant seeds generally have a limited shelf life and Crinum seed can 
last for months before being planted, sometimes 6-8 months (especially for 
big seeds, walnut-sized seeds).  I have not generally tried to store Crinum 
seed; it just germinates when it wants to.  Storage of extra small Crinum 
seeds is risky; some hybrid-type seed can be very small for Crinum, and such 
seed needs to be planted as soon as you can.  Interestingly, it seems to do 
no good to open a Crinum seed pod prematurely; seeds taken early seem to 
fail more often than not.



Sometimes, if seeds are produced in fall, I have planted them and they have 
remained quiescent until spring.  When temperatures warmed a bit, and days 
got longer, the seeds germinated (C. asiaticum, C. pedunculatum, C. 
erubescens).  I sent some Crinum bulbispermum Jumbo seeds to an email friend 
overseas and they took about 2 months to get there because I sent them book 
rate.  The seeds had mostly germinated, but being Crinum some of them made 
little plantlets that could be rescued.



I've been afraid to refrigerate seeds and am happy to hear that Jim S. has 
had good luck with that approach.  Surely, coolness slows down the urge to 
germinate and must help prolong general shelf life (just like a head of 
lettuce).  I've just been reticent to try refrigeration for Crinum seeds.



QUESTION for Jim S.

-----------------------------

Have you stored many types at 4 C; do tropical Crinum seeds accept 
refrigerator conditions?



NOTE:

-------

Just when you want Crinum seeds to germinate, some will  "store themselves" 
and take and extra 2-4 months to germinate, even when conditions seem 
optimal.  Go figure.







Cordially,



Joe

The "second spring" of the year is here.  Temperatures often remain pleasant 
and above freezing until mid-November or even early January.  Rainlilies 
really grow during this not-too-hot time.


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