Reasons for a rhododendron cut - occasions in focus
There is broad agreement among rhododendron experts about the start of pruning. In the first few years, you should let the picturesque flowering shrub do as you like. The opulent ornamental wood develops an inimitable habit with a stable frame and compact stature. You unfold the colorful flower clusters every spring from the buds that were already planted the previous year.
also read
- Cutting weigela for concentrated flower power - tutorial for masterful cutting
- First select the correct rhododendron location, then plant
- Rhododendron earth is not just rhododendron earth
Plant and education cuts are to be deleted on the rhododendron without replacement. Apart from caring for the flowers in summer, a rhododendron does not need any pruning in the first few years. Only when the balanced growth begins to falter with increasing age, optical disruptive factors can give rise to cutting measures. The following table summarizes which these are, which goal is aimed and which point in time is advantageous:
| Cut type | Goal setting | Recommended date |
|---|---|---|
| Cleaning up | Remove dead flowers, encourage new buds | after the flowering period |
| Conservation cut | remove bald and unfavorable individual shoots | in the spring before flowering |
| Taper cut | revitalize old shrub | in late winter until 1. March |
| Body section after rejuvenation | Promote new growth after radical cutting | in the spring before flowering |
For all dwarf rhododendrons (Rhododendron repens), only flower care is important. Popular varieties such as 'Pumuckl' remain comparatively small and compact with a height of 50 centimeters. Even after many years nothing changes in that, so you don't have to think about a conservation or rejuvenation cut. Regular trimming of wilted inflorescences gives thanks to the little beauties with a dense flower dress that covers the green leaves.
Blossom care on the rhododendron - sham cut without scissors
Two convincing arguments speak in favor of annual flower care: When it is withered, a rhododendron is truly no feast for the eyes. In addition, the buds for the next shoot are already below the faded flowers. One Secateurs is not required for the maintenance measure. How to clean withered rhododendron flowers by hand:
- With your index finger and thumb, grasp the small piece of shoot under the withered inflorescence
- Snap off the flower cluster or break it off to the side
The sooner you start cleaning up, the easier it will be. Keep the new buds and fresh shoots below the withered flowers eye. At this early stage of growth, the parts of the plant are fragile and break off quickly.
background
Remove water bolts promptly
Conservation pruning has individual shoots in its sights
Sometimes balding branches protrude from a rhododendron and disturb the well-groomed appearance. These shoots are a case for maintenance pruning. If you want the cut back to be invisible at first glance, we recommend this cutting technique:
- The best time is before the start of flowering
- Examine the shoot concerned for a lower, young, unbranched shoot
- Start the cut at the fork of the branch and side branch
- Leave the small cones of 5 centimeters with the leaf on one side
The cut is a combination of Derivative cut and tenon cut. With this strategy you reliably prevent unsightly gaps and optimize the prospects of a new bud at this point. The figure below illustrates the procedure. If, on the other hand, you saw a cheeky branch haphazardly somewhere, you will look in vain for young shoots and will have to live with a large hole in the foliage for many years.
When individual branches protrude cheekily and bare from the rhododendron, you bring in Derivative cut the instincts to reason. Shorten the unfavorable shoot so that a young, short side shoot takes over the new leadership position. Small cones with leaves encourage new growth because the nutrient supply is not interrupted.
background
Cutting technique "on tenons" perks up tired rhododendrons
Rejuvenation cuts reverse aging - it succeeds in stages
If the ravages of time gnaw on a rhododendron, you are not powerless to face the gradual baldness. Spread over several years you can regenerate the old, aging shrub. Please do not be tempted to put the barren, barren ornamental wood on the cane in one go. In this case total failure is preprogrammed. It is better if you follow the instructions in this tutorial. How to do it right:
- The best time is on a frost-free day before the 1st. March
- Important: taper cuts according to Federal Nature Conservation Act do not perform between 1. March and 30. October
- A third of the bald shoots derive from a young side shoot
- Leave 5 centimeters of cones at the intersection behind the fork
- Heavily aged scaffold shoots lead to the lowest side shoot near the ground
The figure below illustrates the first stage on the way to rejuvenation. Fertilize Then generously sprinkle the cut rhododendron with leaf compost and Horn shavings(€ 32.93 at Amazon *) or special rhododendron fertilizer with an NPK formulation of 14 + 7 + 14. There is a waiting period of one year until the procedure continues as a combination of build-up and taper cut. You can find out how to do this in the following section.
In the first stage of rejuvenation, you remove a maximum of a third of all shoots or redirect them to a lower side shoot. Again, leave cones that are 5 centimeters thick.
Digression
Proper cutting tools are crucial
The body section completes the rejuvenation - this is how it works
Under ideal conditions, the first cones sprout after regeneration in summer. Remnants of cones dry up as they grow and can be easily removed. In the following spring, cut back the next third of overaged branches, again using the combined drain and tenon cut. The illustration below shows the correct procedure.
Take this opportunity to take a close look at all the young ground shoots. Select the strongest specimens and cut off weak competing shoots at ground level.
If no cone has emerged, postpone the second stage of regeneration for another year. Failure to grow young shoots signals that your rhododendron is still suffering from the rigors of the first stage. By doing without further pruning, you give the shrub the opportunity to gather its strength.
If the first young shoots form at the interfaces in the year after regeneration, the next third of the old shoots is rejuvenated. Without a fresh shoot, wait until next year with the next stage.
background
Wound closure on rhododendrons is no longer up to date - with one exception
frequently asked Questions
What is the difference between rhododendron and azalea?
The genus rhododendron includes more than 1000 species, including azaleas. Because of this, the popular Japanese azalea Called Rhododendron japonicum by botanists. Regardless of the close botanical relationship, you can distinguish between the two flowering shrubs based on optical characteristics. A rhododendron thrives as an evergreen, mostly spreading shrub. Azaleas, on the other hand, shed their leaves in autumn or winter and develop an upright, less expansive stature.
Are Rhododendron Shrubs Poisonous?
Most rhododendron species and varieties contain a cocktail of various toxins. Not only the leaves are health-threatening, but also roots, buds, flowers and fruits. Excessive consumption causes severe symptoms of poisoning in humans and animals, ranging from nausea and vomiting to dyspnoea and slowed heart activity. Please only integrate a rhododendron into the garden design if the plant is out of the reach of children and animals. Protect yourself with gloves when cutting. Do not dispose of clippings on the compost or in a pasture, but in the organic waste bin.
Can I use clippings to propagate cuttings?
Propagating rhododendrons with cuttings is a challenge even among plant experts. Tree nurseries usually multiply the ornamental wood by grafting. Instead of messing around with these complicated methods, we recommend the kneeling method. Semi-lignified shoots near the ground are perfect. First remove all side shoots and lightly score the fabric on the underside. You dig the part of the shoot with the wound into the ground. Fix the end of the shoot to a wooden stick. The mother plant and offshoot remain connected to one another until the offspring has developed its own root system.
Rhododendron buds die off - what to do?
They describe the typical symptom of a fungal infection caused by the rhododendron leafhopper. When they lay their eggs, the insects cause tiny wounds on the bud that use fungal pathogens as a gateway. Remove dead flower buds promptly and dispose of them in the household waste. So that it doesn't even get that far, you can use yellow panels to prevent the female cicadas from laying eggs in August and September.
The 3 most common mistakes
No rhododendron pruning master has yet fallen from the sky. Although the beautiful flowering shrubs are easy to care for per se, pruning requires attention to the special growth characteristics. The following table would like to arm you for the three most common cutting errors with tips for prevention.
| Cutting errors | Damage image | prevention |
|---|---|---|
| withered flowers not trimmed | diminishing abundance of flowers | Break out withered flowers promptly |
| aged rhododendron put on the stick | Total failure | Rejuvenate the old shrub in stages |
| not cut back on tenons | no new shoots at the interface | Always cut branches with a small cone and a lateral leaf or shoot |
Youtube
Tips
Transplanting rhododendrons requires rethinking the pruning. While pruning is part of the standard procedure for other garden shrubs, the measure is canceled without replacement for rhododendrons. The sap pressure is simply too low to sprout again after changing location and pruning. You should therefore pay special attention to a replanted rhododendron when watering and fertilizing so that it can compensate for the lost root volume on its own.