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Malta Gardening Forums => Roses => Topic started by: MG on January 23, 2007, 14:04:46 PM



Title: Rose cuttings in January
Post by: MG on January 23, 2007, 14:04:46 PM
Roses can now be propagated by means of cuttings. It seems that the past year's flowering stems, which are likely to be pruned out anyway, are the easiest to root. The "flowering end" takes more readily than the basal end. This seems to be a reflection of the fact that in the wild, roses and similar species such as bramble tend to use natural tip layering as an important means of propagation, so the hormones that promote rooting may be more concentrated in this area.

The ideal cuttings seem to be semi-ripe (semi-hardwood) cuttings, ie in the area where the stem is green but turning brown in places.

Cut into sections 15-30 cm long, cut below a node (budding area), and the application of rooting powder, while strictly not necessary, also generally has anti-fungal properties so is recommended. Ideally stick into sterile (new) compost, to avoid the problems associated with organisms found in ordinary soil (or used compost). It may help to leave a couple of leaves, as leaves produce the energy a plant requires, so results may be better. In such case, cover the cuttings with a polythene bag.

It will take about a month for roots to start forming. If you cover the cuttings, the high humidity levels may even cause aerial roots to form, which are a useful indicator of progress.

If you have the option, layering offers almost guaranteed results, again pinning down a section of stem close to the tip. Easier with rambling varieties, or roses that have been freely allowed to grow long arching stems possibly for this particular purpose.

MG


Title: Re: Rose cuttings in January
Post by: MG on January 31, 2007, 12:27:57 PM
As an aside, this year I did a little experiment, sticking some cuttings into sterile compost, and another lot into a garden-soil / compost heap mix.

Furthermore, the soil-based lot were not covered.

Out of approximately 6 placed in the compost and covered, 5 have definitely rooted, even pushing out aerial roots, and the sixth is still alive and likely also successful (just did not put out aerial roots).

Of the other lot, ALL except one have turned black and died, and the one which is not completely black is particularly dark in the lower inch above soil level, so may also go that way.

While the covering with polythene may have helped in keeping the leaves on the stem for longer in the compost-planted set, and thus keeping the cuttings stronger, the blacking off of the soil-planted cuttings is due to a fungal infection from the unsterile medium.

There is a lot to be said for starting off your rose cuttings in pots of sterile compost, rather than planting out directly into the ground.

MG


Title: Re: Rose cuttings in January
Post by: jajay on November 15, 2007, 14:27:41 PM
I found the information on Rose cuttings very interesting.  I tried four cuttings (in October though) and put them in new compost and covered the surface of the soil with plastic film but I did not cover the whole cuttings. After some time three of the cuttings turned black and were evidently dying, while the last cutting had two leaves which were still looking good, green and healthy, however after another week it turned black as well. Was this because i tried to root the cuttings in the wrong time of year? Or the fact that the cuttings turned black might mean something else? 


Title: Re: Rose cuttings in January
Post by: MG on November 15, 2007, 15:07:46 PM
The blackness is a fungal disease which enters the cutting from where it has been cut. Covering the compost with plastic was not a good thing to do, in fact it is worse than doing nothing at all - as it keeps the compost too wet and thus ideal for the fungus to thrive.

The point of covering the CUTTING with plastic, is to maintain high humidity around the leaves, preventing the cutting from wilting and thus keeping it alive until it has put out roots.  Of course one normally encloses the cutting and the top part of the pot, i.e. the soil surface, but the only benefit of that is that one attempts to keep out the bad stuff, the risk again being keeping it excessively wet.

You were correct in using new compost, but also make sure that the pots, etc, are clean also.

As an aside do not expect 100% success, but if all is done correctly then most of the cuttings should survive.

MG


Title: Re: Transplanting a rose
Post by: Avocado on September 24, 2008, 19:51:30 PM
The question is when to do it ? Possibly between November and February?
Thanks.


Title: Re: Rose cuttings in January
Post by: MWP on March 25, 2014, 06:07:40 AM
I think it is too late now right ? Wanted to experiment a bit with a beautiful salmon-coloured just abandoned in an unused field.  If there are workabouts for late cuttings, Let me know, I'll try them and keep you posted.




Title: Re: Rose cuttings in January
Post by: MWP on March 25, 2014, 06:15:49 AM
"In such case, cover the cuttings with a polythene bag."

MG, what do you mean cover the whole thing, or cover the compost only (as JayJay did?)


On youtube, there was a tutorial where the lecturer (so to speak) dipped the cutting in honey - wtf?!?!   Have anyone tried to put them directly in water only for the first 2 weeks (perhaps speeds up rooting?) and then stick in new compost?

Would you recommend mixture of sulphur (or antifungal powder) and rooting powder?

CIao
I forgot about this forum!



Title: Re: Rose cuttings in January
Post by: MG on March 26, 2014, 13:42:55 PM
Hi MWP, a bit late now for cuttings.

However if you have access, try bending a stem over to the ground and layering. Just burying the entire growing tip is probably best, however wrong it seems to be. No need for sterile compost or covering, obviously.

Re covering - you cover the entire cutting so that there is no transpiration from the leaves which causes the whole system to collapse.

MG