Why do rose cuttings suddenly wilt after sprouting?

This is day 875 of Lanyao's daily original articles

Article 73 in the rose cultivation series

A few days ago, Lanyao shared a method for rooting rose cuttings, and many gardening friends tried it out after reading it, with some succeeding and some failing.

We say the reasons for success are roughly the same, but the reasons for failure are many and varied. Just yesterday, a gardening friend asked Lanyao why their rose cuttings had sprouted but then suddenly withered.

I believe there must be quite a few gardening friends who have encountered similar problems. So what exactly causes our cuttings to fail?Reasons for cutting failure:The reasons for rose cutting failure can be roughly divided into the following 6 types

1. Inadequate disinfectionWhen rooting rose cuttings at higher temperatures, you must disinfect the branches and soil, because bacteria multiply quickly at high temperatures. If disinfection is inadequate, black stems are likely to appear and cause cutting failure.

2. The cutting soil contains pathogens or fertilizerFor rooting rose cuttings, it is best to choose sterile, fertilizer-free plain soil. Lanyao recommends using pure vermiculite or pure perlite for cuttings, which greatly reduces the chance of black stems.

3. The branches are not robust enoughMany gardening friends do not know what kind of branches should be selected for rose cuttings, thinking that thick old branches are good, but old branches have insufficient growth vigor and are often not easy to root successfully.

The best rose cutting branches should be those pruned from plants that have just finished flowering, or after flowering, cut off the spent flowers, wait one week, and then cut the branches for cuttings. Such branches store sufficient nutrients, and the branches themselves are relatively mature, making them easy to root.

4. Improper pruningRose branches used for cuttings need to consume nutrients before they root, so the branches should not be left too long. Some gardening friends are more impatient and use the entire branch for cuttings. This makes it very difficult to survive, because overly long branches consume more nutrients and wither before they can grow roots.

Pruning of cutting branches should retain 1-3 buds, depending on the distance between nodes on the branch. The total length of the cutting should be controlled within 10 cm.5. Variety-related factorsAlthough they are all roses, some rose varieties are relatively difficult to root from cuttings. Often, rose varieties with good qualities are relatively harder to root from cuttings and are more commonly propagated by grafting.

So if you have taken cuttings of a certain rose variety and they never root, while other varieties can all successfully grow roots, you can basically judge that it is a problem with the variety, not with your operation. After all, for home propagation, the conditions are still limited.

6. The temperature is too highGardening friends who often take cuttings will notice that when taking cuttings in late spring or summer, the rose branches often begin to sprout one or two weeks after cutting. It looks quite exciting, as if they have survived, but in fact it is false survival. What is false survival? As the name suggests, it is fake survival. Normally, successfully rooted cuttings will not sprout so quickly. It basically takes about 40 days before sprouting and growth appear. Sprouting too early is basically a sign of false survival.

Besides variety-related factors, the cause of false survival is also strongly related to temperature. When the air temperature is higher than the soil temperature, false survival is often triggered, so false survival is most likely to occur in late spring and summer.

Therefore, choosing the timing of cuttings is also very important. Of course, in principle, roses can be propagated by cuttings all year round, but for our home propagation cuttings, conditions are limited. Choosing a suitable time for cuttings can yield twice the result with half the effort.

Generally, early spring, late autumn, and winter are relatively worry-free times for cuttings, with simple management and a high survival rate. In late spring and summer, temperatures are higher, and cutting failure is often caused by bacterial infection and excessively high temperatures.

The above is a small summary and analysis by Lanyao on rose cutting failure. I hope it gives you some inspiration.

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