Remember not to cut fall-blooming shrubs until they have finished blooming in order to adhere to Rule #1. Rose of Sharon, hydrangeas, and other shrubs are examples of those that bloom in the fall. Forsythia, spirea, lilac, and other shrubs that bloom in the spring should be clipped in the spring or summer after they have finished blooming. These shrubs frequently blossom on new growth, so prune them early in the season to encourage healthy growth and flowers the next year.
Prior to beginning the trimming process, remember to preserve and improve the flowering shrub’s beautiful habit. Take care to avoid cutting the shrub in an awkward or boxy shape (unless you want to sacrifice flowers and make a hedge). Branch out dead and straying ones. Reduce by one-fourth the age of the canes. This gives the plant new strength, allows air and light to circulate through the heart of the plant, and creates room for new flowering stalks to grow.
Fall Pruning of Vines
Pruning is completely dependent on the type of vine. Some clematis require pruning, while others don’t. Follow the instructions on the plant tag from a reliable neighborhood garden center, or seek advice from the knowledgeable staff at the neighborhood nursery.
Fall Pruning of Berry Plants
Once more, the amount of trimming needed varies greatly depending on the cultivar and type of berry. Ever-bearing bushes require a different kind of trimming than berries used for the primary crop. There are various needs even then. If you need to leave that fresher growth for the berries of the following year, you shouldn’t cut it back too much in the fall. Consult your trusted garden center’s knowledgeable staff once more. Make sure to identify the type of fruit you have.
Fall Pruning of Fruit Trees
Fruit trees should not be pruned until the winter, when they will be dormant (leaves will have fallen and temps will be in the 30s and 40s). We advise pruning in northern Utah in January and February. Use the right pruning methods while pruning trees in the winter. Video on winter pruning. Keep in mind that you can prune away any dead or damaged branches at any time.
Fall Mowing “Pruning of Lawn/Turf
In fact, mowing your grass is a sort of “pruning. In comparison to the summer, when you want the shade of the blades to help preserve moisture in the soil and more green for stronger roots, your final mowing of the season should be shorter. Set your lawn mower to the 11/2 setting and give your lawn a good trim when you’re ready to put it away. Be careful not to overachieve and “snip the grass. You want to make a lovely quick cut, but you don’t want to damage the plant’s base.
A second autumn lawn You should sprinkle your fall fertilizer right away. Now is the time to apply a fungicide treatment if you have experienced fungus problems. Additionally, weed management is still effective when the daily high temperature is between 55 and 60 degrees. The neglected fall lawn is a haven for weeds.
Fall Pruning of Perennials
Remember the aforementioned Rules #1 and #2. The same rule applies to dividing and transplanting in the fall: don’t prune until the plant has finished blooming. Don’t transplant the plant until it has finished blooming. This implies that you must wait until your fall bloomers, such as Chrysanthemums, Autumn Joy Sedum, etc., have finished blooming before you divide, transplant, or prune. Be tolerant! You still have a ton of gardening and pruning to perform. Before the beds are finished for the winter, these are the last ones to prune.
Two Additional General Perennial Fall Pruning Guidelines:
- When the plants start to wither, prune them, leaving as much of their greens as possible to keep the roots supplied with nutrients.
- Reduce them to 3–4 inches above the ground. This is because over the winter, most perennials rot down to the ground. The plants will be marked by 3 inches during the winter. Additionally, the 3 to 4 inches in the spring are low enough that you won’t need to go back and prune when the plant sprouts.
EXCEPTIONS to the Perennial Pruning Rules: Evergreen perennials like candytuft and woody perennials like lavender only require light pruning to shape. Follow the advice of your master gardener at an independent garden center like Western Gardens if you’re unsure of what to prune or how much to cut back. We would be delighted to support your garden’s success.
Which month should lilac bushes be pruned?
All lilacs should generally be clipped right away in the spring after they have finished blooming. Lilacs set their flower buds for the following year immediately after the current year’s flowers have faded, therefore trimming later in the summer or fall will result in the removal of most or all of the blossoms for the following year. The larger common lilacs as well as the shorter or more “shrub like” cultivars are all subject to this timing guideline. While the “when” of lilac trimming is rather simple, the “how” is a little more difficult. For the time being, we’ll refer to lilac pruning as either maintenance pruning or rejuvenation pruning to keep things simple.
Do lilacs require pruning?
An old, overgrown lilac was one of the few plants that endured my garden restoration. The fact that it obscured my neighbor’s garage and, more importantly, sported steel-blue double flowers, led me to rescue it. Although the blossoms on this shrub were both lovely and fragrant, it was difficult to appreciate them because there were so few of them. I decided to go with a rejuvenation pruning because I knew there was no reason to give up on this long-neglected plant because lilacs can handle severe pruning.
On stems that are no older than five or six years, the common French lilacs (Syringa vulgaris cvs.) yield the most and the largest flowers. The flowers get fewer, smaller, and farther away as the stems get older. A lilac, however, may reliably produce blossoms for decades with the right trimming. The method you choose will depend on how old your shrub is. Plants are maintained annually to keep them healthy. A more drastic trimming may be necessary for lilacs like mine that have seen better days.
Lilacs should be clipped annually to encourage healthy stem development and strong growth that improves flowering. Cutting sick, deformed, and unproductive stems to the ground constitutes annual pruning. I thin and cut back some stems as well to promote healthy, evenly spaced growth. To prevent them from growing too far away from the center of the plant, I also pruned a few of the new shoots that emerged from the roots. I left a few inches between each stem to prevent crowding. Since they produce the most, I maintain the pencil-thick shoots that extend all the way to the ends of the branches. Small, twitchy growth is unproductive and won’t blossom. This growth can indicate an excess of aged, unproductive stems or too much shadow. Remove stems as soon as possible after blossoming, or in late winter if you don’t mind losing a few blooms. Cut off stems and shoots at or just below the soil line.
Dwarf lilacs rarely need pruning
Both the “Palibin” Meyer lilac (Syringa meyeri “Palibin”) and the “Miss Kim” Manchurian lilac (Syringa pubescens ssp. patula “Miss Kim”) are twiggy-habiting, somewhat small lilacs. On these types, just deadheading is needed in terms of pruning. You can prune some of the older stems as the plants get older to make place for younger, more robust stems. In contrast to regular lilacs, these plants hardly ever spread out of control. They might never need to be entirely regenerated if you only undertake a tiny amount of trimming every few years.
After the blooms have faded, deadheading, another aspect of annual maintenance, should be carried out as soon as feasible. Just above the two new shoots that slant out from the stem that stopped with the old bloom, the base of the old flower cluster should be cut off. The new shoots will develop throughout the course of the summer, produce flower buds, and culminate in a cluster of flowers the following spring. While not as crucial as the annual thinning, eliminating the old blossoms enables the plant to focus more of its energy on developing robust branches and flower buds. In June, I deadhead and thin my plants as needed.
While performing this yearly maintenance, I occasionally come upon a young, robust shoot that may be getting too tall but is still a good, productive stem and is a candidate for tipping off. I cut the wasted flower’s entire top stem back to one or two side shoots at the desired height rather of just cutting it off at the base. The side shoots that are now near the top of the bush are encouraged to grow vigorously and develop flower buds for the following year by this cut, which also aids in shrinking the shrub.
My own old, overgrown lilacs need more severe pruning. I went outside in the early spring before growth got going to get a good look at the bush. I looked to see if the plant had been grafted before I began chopping. I immediately cut it down to the ground as it hadn’t (for a grafted plant, see the panel below). I recognized that this drastic trimming would result in the plant losing part of its aesthetic appeal for a few years because lilacs bloom on the growth from the previous season. However, I was also aware that the reward—more blossoms and a stronger plant—would be worthwhile.
It’s crucial to nourish the plant after rejuvenation pruning with compost, composted manure, or a balanced chemical fertilizer and to make sure the soil pH is close to neutral, which lilacs appreciate. In the upcoming years, these supplements and some high-quality mulch will help to encourage vigorous new growth and enhanced flowering.
Has your lilac been grafted?
If your lilac has been grafted, check it out before you start making cuts to the stems. Grafting is a method of plant multiplication in which the scion, or branch, of one species is joined to the rootstock, or stem, of another species. This is typically done to enhance a plant’s look or traits. A graft union, where the cultivar’s scion wood joins the rootstock several inches above ground level, should be obvious. An apparent change in the bark from the rootstock to the scion’s bark, as well as a little swelling at the graft union, are things to watch for. If your plant has been grafted, all of your cuttings must be made above the graft union, and you must prevent shoots from the rootstock from developing into new flowering stems. Flowers of the desired shape or color will not be produced by shoots that emerge from the rootstock.
How late can lilacs be pruned?
Between April and June is the best time to prune lilac bushes, but only after they have stopped blooming. Although it may seem strange, lilac bushes bloom on the growth from the previous year, therefore by pruning sooner rather than later, you won’t damage the blossoms in the following year. The same holds true for lilac tree pruning techniques.
How should an overgrown lilac bush be pruned?
Similar to the lilac, heavy pruning needs to be done over a number of years. Remove any dead, spindly, dying, or ill-looking wood first. At the base, remove roughly a third of the tallest, oldest branches. The remaining branches should then be cut back by at least a foot. Over the following two years, repeat the same action.
Azaleas and rhododendrons prefer somewhat acidic soils. The optimal time to fertilize in the spring is right after flowering. Though slightly more expensive than chemical fertilizers, organic fertilizers release their nutrients gradually and require less frequent application. After July 15, refrain from fertilizing to prevent the plant from going into full dormancy before winter. Use of lime or alkaline fertilizers should be avoided.
In the summer, rhododendrons and azaleas require a lot of water due to their shallow, fibrous root systems. Make careful to thoroughly hydrate them. You will require water all year long if they are planted beneath wide eave overhangs. Avoid going too deep when hoeing or raking around the plants. Mulches can be used to control weeds, maintain more consistent soil temperatures, and save moisture. Examples of such mulches include sawdust, bark dust, peat moss, straw, or other organic materials.
The garden is busy at the moment. These days, your vegetable garden can contain just about anything. Don’t put it off! Plant more lettuce, carrots, beets, potatoes, peas, cucumbers, squash, pumpkins, melons, dill, basil seedlings, and brassicas. Also plant more beans, tomato and pepper plants, and more lettuce.
Should lilacs be deadheaded?
The removal of spent flowers to encourage new blooming—deadheading—is a crucial part of lilac maintenance. Lilacs should be deadheaded as soon as the flowering is finished to allow the plants to grow robust, healthy buds that will flower vivaciously the following year. According to the University of Minnesota Extension, you can use a hand pruner, but larger plants could require a hedge trimmer. Only the dead blossom should be removed; the plant should still have two leaves.
According to the Chicago Botanic Garden, you should prune lilacs at the same time as you deadhead them since they set the blossoms for the following year quickly after flowering. By doing this, you can prevent damaging or removing the developing buds. Three to four years after planting, you should start pruning lilacs. It might be necessary to trim back overgrown lilacs to just a few inches above the ground. Winter is the ideal time to complete this. In this instance, it will take the shrub one or two growing seasons to start blooming once more.
How are lilacs prepared for the winter?
When choosing a location for your lilac shrub, consider the winter climate. For this plant to thrive, it requires alkaline to neutral soil and at least 8 hours of direct sunlight per day. Do not place them up against a wall or structure with light colors. Winter burn may be caused by the reflection. Cover the plant’s base with 3 to 4 inches of mulch to help minimize winter heave (the exposing of roots caused by the freezing and thawing of the earth). If a severe freeze occurs in the late winter or early spring, you might need to cover your shrub to keep the new buds safe. You can use burlap, a blanket, or a plastic tent.