Post by Michael Catalani on Nov 4, 2007 5:11:55 GMT
If I start the cuttings late in summer or fall, I move them to a grow chamber under lights, and place them back into a temperate environment the following spring after any chance of freezing has passed.
Michael, Any idea of the temps in your 'grow chamber'? About 2 weeks ago, I took some 'pullings' from several purps and psits. Placed them under lights in plastic box w/ ends in chopped live LFS. The temps have been running ~78*F - a bit warmer than I wanted (although I've always been suspicious of the black remote temp sensor having higher readings than the true ambient temps).
Normally a lowland Nepenthes grow chamber, or in a tc lab under lights. Temps are in the 70F-85F range.
Update on my "pullings": The S. readii pulling failed (1 month and a half into it, turned into a brown readii ... thing) - BUT - 1 day after I did that I went out and cleaned up some other plants. I currently have about 12 S. flava var. rubricorpora. pullings sitting in a large terrarium with tropical dews - temps average about 75's and bright lights. They are still green, no signs of rot or anything. I hope these work... The plants were going into dormancy, I don't think they were "fully dormant"
Gary: The "rhizome rotation" sounds interesting. I'll give that a shot when it comes time for me to repot my sarracenia...
Update on my leaf-pulling trial from last fall. I had previously checked several of the pitchers and found that they had roots. I've been waiting for at least one of the leaf-pullings to send up a new sprout. Not one did. So today I dismantled the original propagation chamber (plastic tub which spinach comes in) and potted up the leaves which had roots. Of the ones that had roots, most of the them were extensive - the shortest was probably 4" long.
Out of the 19 leaves - 15 were S. purpurea forms and 11 of the fifteen had root systems. The other 4 leaves were S. psittacina and none of them had any roots. Here are the detailed results so far:
S. rosea (code 23) - 2 of 3 had roots S. rosea (code 23B) - 4 of 5 S purpurea ssp. venosa var montana (code 21A) - 2 of 3 S purpurea ssp. venosa var montana (code 21) - 1 of 2 S purpurea ssp. venosa "Brunswick Beauty" (code 22A)- 2 of 2 S. psittacina (code 60) - 0 of 2 S. psittacina (code 61A) - 0 of 2 (code numbers refer to my plant tracking system and are correlated w/ my growlist - which has more info & some pics).
I found it interesting that although 2 of the pitchers that did not develop roots just rotted, all of the others were still mostly green with some looking just as they did when pulled. Pitchers were placed in chopped live LFS (which had to be periodically trimmed all winter).
8/12/08 - things are not looking so good. As mentioned in previous post, I potted up all of the pitchers that had developed roots & placed them outside w/ the other Sarrs. It seemed like a no-brainer that they would soon start to send up new pitchers. So far, this is not the case. There has been no new growth at all and some of the pitchers are browning and looking like they are headed for the dead zone.
Unless something changes soon, it appears that all of these leaf-pulling pitchers from last fall will have failed to develop into new plants (even after developing extensive root systems!).
I'm interested in hearing other's thoughts on these results. My preliminary theory is that taking the pullings in the fall was a flawed strategy.
What kind of humidity did you keep your plants in? When I've done successful leaf pullings, I kept the plants in baggies, 100% humidity.
Barry, The pitchers were in the container pictured above w/ a lid. There was a small cutout for the wire on the temp sensor (visible in upper right corner) but the humidity was likely close to 100% - until I potted up the ones w/ roots. These guys then went out w/ the others - uncovered.
Sounds like you're doing the same stuff I've done.
I have to tell you, leaf pullings on Sarracenia is something that is WAY open for research. I've had great success on Sarracenia purpurea, S. rosea, and S. psittacina most times, but then other times got nothing but heartbreak for my efforts.
I've gotten almost nothing with my attempts on other species, although I have gotten root formation a few times.
Do keep notes of your work; I hope you can elucidate us on best practices!
It appears that anything with a bit of rhizome tissue attached will potentially regenerate and I have had success with the tiniest of cuttings, including nothing more than a bit of rhizome skin with a single root attached. This I suspect is the truth behind the "leaf pulling" technique. A pulled leaf including some rhizome tissue (no matter how small) may result in new plants.
As Aidan points out, your photograph shows what I'd rather call a small bud or growth tip that you've removed from the rhizome. What I think of, more strictly, as a leaf pulling, is when you've removed the leaf, and only the leaf, by pulling it from the rhizome. If you look at the bottom of the pulling, you will notice the clasping leaf base, but no other structures such as roots, leaf scales, or other primordial buds.
Aidan's theory is that the clasping leaf base may have tiny amounts of rhizome, and those rhizome cells provide the nucleus of the successful leaf pulling. I tend to agree with him.
I've had very good success with those sarracenia "pups" (for lack of better a description) as shown in your photo above. Like you mentioned about inducing or restoring growpoints - it seems as if the rhizome "stripping" (pulling the leaves off from the base - as if trying for a leaf pulling) help to induce more "pup" formations, however, it may take a season or two before having something worth snapping off. I've had very good success with rooting those 'lil blokes - with both species and hybrids. I've tried it so far on a few flavas, rubras, minors, and a few hybrids and so far, they all were successful - and all now with root systems.
BTW: with the initial leaf pullings I tried when I first posed the question on this thread -- only 1 or 2 made it, the rest went bye bye. Oh well. At least I got some "pups" forming from em :-)
'Final' update on my pullings taken from last fall. Yesterday, I gave up and removed the pitchers from the pots into which they'd been transplanted earlier this year. I checked each closely for any signs of sprouting new pitchers - none were found.
It's still hard for me to grasp that a plant would put significant energy into producing roots but none toward parts above the soil line. However, the facts cannot be disputed (at least by me). Looks like next time I try this, it should be in the spring .... Here's a pic I snapped of some of the pitchers and their associated root systems: