How to Root Trees

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Hardwood trees can be propagated through taking cuttings and then forming roots. This is an easy and inexpensive way to clone your favorite tree, so that you can have many in your garden or to take with you if you move house. Simply cut a branch of new growth off a tree, grow the cutting until it forms a root system, and then transplant it to a new spot in your garden.

Part 1
Part 1 of 3:

Taking Cuttings

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  1. Cuttings from hardwood species are taken during the dormant season, which is when the tree doesn't have leaves. This is usually between mid-autumn and late winter. [1]
    • Keep a close eye on the tree once autumn begins, as the best time to take cuttings is just after the leaves fall.
  2. Branches that have shown significant growth are ideal, as these are the most likely to give good, healthy cuttings. Pick a few branches that don’t have any disease or insects. The best thickness for cuttings is about a pencil-width. The branch will be woody, rather than soft or green. [2]
    • Generally, the healthier and more vigorous the shoots that you select are, the more likely that the cuttings will be successful.
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  3. This is where the current season’s growth joins the 2-year-old growth. This section will be mature and woody. [3]
    • Sharp secateurs are the best to use to take cuttings. [4]
    • Snip the unripe, softer, and greener wood, which is at the top of the branch, off the cutting.
    • This part of the branch has the best potential for root development, which means that the cuttings are more likely to be successful. This is because this area has many dormant buds that give hormones to the developing roots.
  4. The cut needs to be approximately ¼ inch (6 mm) below the lowest bud that you can find. Make sure that this cut is horizontal and straight. [5]
    • Buds will look like slightly raised areas that are somewhat different in color from the rest of the branch.
    • You will need to cut the branch in 2 different places to take a cutting. This first cut will be horizontal and closer to the base, and the next cut will be angled and closer to the top of the branch.
  5. Find a bud that is within this distance. This is where the top cut will be. [6]
  6. Make sure that the cut slopes away from, rather than towards the bud. This will leave behind the best mature wood of the current season’s growth. [7]
    • The distance between the horizontal cut at the base, and the angled cut at the tip will be around 6 to 10 inches (15 to 20 cm), depending on the size of your tree or shrub. Make larger cuttings for larger trees, and smaller cuttings for smaller trees.
    • Remove all the leaves from the cutting before you plant it.
  7. Scrape off a thin sliver of bark at the base of the cutting using a knife or secateurs. This will wound the cutting, which makes it more likely to root. [8]
    • This helps to remove a physical barrier which might get in the way when roots start to form.
  8. This will help to stimulate root growth from the cutting. Simply open the lid of the container, and dip the base of the cutting in. [9]
    • Lightly tap the cutting after it has been dipped into the powder to shake off any excess.
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Part 2
Part 2 of 3:

Planting the Cuttings

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  1. Moist, free-draining cutting compost is popular, but if you don't have any on hand, regular potting mix also works. Fill the pot to just below the top. [10]
    • Coarse sand or coconut coir are more alternatives for propagating cuttings.
    • Medium blends are also alternatives for propagating mediums, such as 1 part peat with 1 part perlite, or 1 part peat with 1 part sand.
  2. Depending on the size of the pot, you will probably fit in around 5 cuttings per pot. The edges of the pot are the best place to plant the cuttings. [11]
  3. Make sure that â…” of each cutting is below the soil, with only â…“ visible at the top. Only the top buds will be visible from above the soil. [12]
    • As you push the cuttings into the soil, make sure that the soil around each one is firmly pressed.
  4. Find a sheltered, frost-free location in your yard. If you live in a frost-prone area, put the cuttings in a greenhouse or cold frame during the winter.
  5. Check on the soil frequently to make sure that it is slightly damp, but avoid overwatering it. You can place the pot in the cold frame of a greenhouse if you have access to one, as this can help to speed up the root formation. [13]
    • Overwatering the cuttings could cause them to rot.
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Part 3
Part 3 of 3:

Placing the Cuttings into the Ground after Rooting

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  1. Most hardwood species prefer soil that is well-drained and fertile. The amount of sunlight your tree will need varies depending on the species of tree you are rooting.
    • Ash trees grow best in well-drained soil with full sunlight. [14]
    • Oak trees prefer dry soil with full sunlight. [15]
    • Dogwood trees prefer well-drained soil with partial shade. [16]
  2. Remove the cuttings from the pot, and plant them in your chosen permanent ground location. The larger the cuttings grow before they are transplanted, the greater their chance of success. [17]
    • The cuttings will have well-formed roots by the following autumn, which means that they should be able to survive in the ground. [18]
    • It’s likely that the roots will start to show through the drain holes of the pot by this time, which means that the plant is ready to be transplanted. [19]
  3. This will help them to grow and develop, and to take well to their new location. Water the cuttings more often during the following summer to improve their likelihood of success. [20]
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Expert Q&A

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  • Question
    Can I grow a maple tree off of an another root in the winter, or would I have to do it indoors? Also, if I cut one off a root in the winter and put in ground now, would it come out in the spring?
    Lauren Kurtz
    Professional Gardener
    Lauren Kurtz is a Naturalist and Horticultural Specialist. Lauren has worked for Aurora, Colorado managing the Water-Wise Garden at Aurora Municipal Center for the Water Conservation Department. She earned a BA in Environmental and Sustainability Studies from Western Michigan University in 2014.
    Lauren Kurtz
    Professional Gardener
    Expert Answer
    Maple trees should be cloned with cuttings, not root fragments. See article for proper rooting technique.
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  • Question
    How do I germinate trees?
    Lauren Kurtz
    Professional Gardener
    Lauren Kurtz is a Naturalist and Horticultural Specialist. Lauren has worked for Aurora, Colorado managing the Water-Wise Garden at Aurora Municipal Center for the Water Conservation Department. She earned a BA in Environmental and Sustainability Studies from Western Michigan University in 2014.
    Lauren Kurtz
    Professional Gardener
    Expert Answer
    In order to germinate, you will need to use mature seeds from the desirable tree.
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    Do you change the water if it gets green?
    Ninox
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    Yes. You have to change the water at 10-day intervals, or more often if it turns green.
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      • Make sure that the tree that you take the cuttings from is in good shape and health. This is because taking cuttings is a form of asexual reproduction (also known as cloning), so the plants that form from the cuttings will be exact clones of the parent tree.
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      Things You’ll Need

      • Secateurs
      • Measuring tape
      • Knife
      • Hormone rooting powder
      • Pot
      • Propagating medium

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      References

      1. ↑ https://www.rhs.org.uk/advice/profile?pid=387
      2. ↑ https://www.rhs.org.uk/advice/profile?pid=387
      3. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      4. ↑ http://www.bbc.co.uk/gardening/basics/techniques/propagation_hardwood1.shtml
      5. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      6. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      7. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      8. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      9. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      1. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      2. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      3. ↑ http://www.bbc.co.uk/gardening/basics/techniques/propagation_hardwood1.shtml
      4. ↑ https://deepgreenpermaculture.com/2012/06/29/propagating-hardwood-cuttings/
      5. ↑ https://www.pollen.com/research/genus/fraxinus
      6. ↑ http://www.uky.edu/hort/Chestnut-Oak
      7. ↑ http://dnr.maryland.gov/forests/Pages/MarylandersPlantTrees/Recommended-Tree-List.aspx
      8. ↑ https://www.rhs.org.uk/advice/profile?pid=387
      9. ↑ http://www.bbc.co.uk/gardening/basics/techniques/propagation_hardwood1.shtml
      10. ↑ http://blogs.oregonstate.edu/treetopics/2014/08/26/propagating-native-shrubs-seed-cuttings/
      11. ↑ http://blogs.oregonstate.edu/treetopics/2014/08/26/propagating-native-shrubs-seed-cuttings/

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