There are more than 300 species of Sedum, a type of succulent from the family Hylotelephium that is sometimes known as “stonecrop.” It has five-petaled yellow flowers and thick, meaty, egg-shaped leaves that are light green in color. This drought-tolerant plant normally doesn’t grow very big and blooms in the summer or the fall. It can grow in dense mats in low-fertility soil due to its resilient, invasive character, which makes it challenging to eradicate. The application of a herbicide is typically necessary to control large sedum infestations.
Small sedum infestations should be eliminated by hand. Sedum plants should be dug out and removed by their roots using both your hands and, if necessary, a garden trowel. Remove the root, leaf, and stem of the sedum plant by carefully pulling it out of the ground. If the roots are not cut out, the plant will just re-grow. Sedum should be removed manually and disposed of in a trash bin.
For more extensive sedum infestations, use a herbicide containing 2,4-D, dicamba, MCPP, MCPA, triclopyr, or glyphosate. Sprays made from combinations of these components are likewise permissible. If you need to dilute the herbicide with water, see the manufacturer’s label. It should be noted that glyphoste is a nonselective herbicide that kills any plant or grass it comes into contact with, thus if you choose a herbicide that contains glyphoste, you will probably kill any nearby vegetation.
If necessary, add water to a garden sprayer along with the herbicide of your choice. To the sprayer, add 1 to 2 teaspoons of surfactant, a kind of “spreader” or “sticker” agent. Given that sedum leaves have a waxy surface and that surfactants make herbicides adhere to plant leaves more effectively, surfactants are advised for the eradication of sedum and related plants. Before using the garden sprayer on the damaged areas, shake the sprayer to combine the chemicals. To the point where the herbicide drips off the leaves, completely cover all sedum plants.
How can you prevent the spread of sedum?
Sedums have everything! This perennial produces clusters of star-shaped flowers that bloom from midsummer to fall, along with lush, luscious green leaves. It attracts pollinators and is simple to maintain. How to plant sedum in your garden is provided here.
About Sedum
Sedum, a genus of succulents with fleshy stems and succulent leaves commonly known as “stonecrop,” is one of the easiest perennial plants to grow. This sedum cultivar is suitable for practically all gardens because it is a hardy plant that thrives in shallow soil.
Based on how the plants develop, we like to split sedum into two primary categories: low-growing sedum and upright sedum.
- Sedum that grows slowly spreads throughout the ground and only grows to a height of a few inches (or less). As a result, they are ideal for use as ground covers along pathways, in rock gardens, or cascading over stone walls.
- Sedum that is tall or upright often grows in tall, upright clumps with dense clusters of tiny reddish-pink flowers in their huge flower heads. They make excellent candidates for border gardens or pollinator gardens due to their height and lovely blossoms. Despite upright sedum’s recent reclassification into the Hylotelephium genus, it is still frequently referred to as a “sedum.”
Although they prefer full sun, Sedum may tolerate partial shade. Plant sedum in full sun to enhance overwintering potential if you live somewhere with long, cold winters (Zone 5 and colder).
Although sedum thrives in sandy or poor soil, it needs to be well-drained to prevent fungus problems. If cultivated in soil that retains too much moisture, it is highly prone to developing root rot. Additionally, overly fertile soil can promote lanky growth, which can cause upright sedum species to bloom with a top-heavy appearance.
When to Plant Sedum
- Typically, sedum is purchased in plugs or pots and then planted in the garden. Sedum is best planted in the spring, after the risk of frost but before the summer heat arrives.
- In early spring, sow sedum seeds in average to rich soil that is well-drained. (Learn more about adding amendments to the soil and getting it ready for planting.)
How to Plant Sedum
- Depending on the kind, space plants anywhere between 6 inches and 2 feet apart. While upright sedums tend to keep more compact, low-growing sedums will quickly fill in any gaps.
- When planting whole plants or divisions, dig a hole deep enough so that the top of the root ball is level with the soil’s surface. Then, insert the plant, and then cover the area around it with soil. Avoid burying upright sedum stems in particular as this can cause rot.
- Planting cuttings: Sedum is easily propagated through cuttings, just like other succulents. Under the right lighting and watering conditions, the cutting should easily root if the cut end is simply inserted into the soil.
- Sedum plants require little maintenance once they are established. Check on your plants frequently over the summer to make sure they are not getting too dry, and water them (sparingly) if necessary. Sedum shouldn’t require extra watering if your area receives rain at least one every two weeks.
- After flowering, prune the plants to keep their shape or confine them to a single location.
- Advice: After blooming, leave upright sedum flowers alone for more winter interest. They will produce lovely seed heads.
- To stop your plants from spreading, remember to divide them in the spring or fall. Divisions and cuttings root easily all summer long.
- Sedum humifusum has stunning, bright yellow flowers and produces an excellent ground cover.
How can sedum ground cover harm grass?
I have a vast hillside in my backyard that is covered in Sedum kamtschaticum, or orange stonecrop. The grass that is bursting through the sedum is a concern for me. How can I remove the grass without causing any damage to the sedum?
A. Physical eradication of the grass and mulch is the most environmentally friendly method of control. This is effective against annual grass weeds, but it is a little more challenging to eradicate perennial grass due to its large root and rhizome structure.
Bluegrass, quack grass, and other perennial grass weeds must be physically removed through persistent and meticulous weeding.
On some ground covers and around trees and shrubs, over-the-top herbicides like Grass Getter can be applied. When using this or any other substance, make sure you thoroughly read and adhere to the label’s instructions.
Q. I want to grow a vine on a trellis to block my neighbor’s yard from view. It has some shade. I would much rather have a dense perennial vine that would shade the area all year.
A. Take into account installing a decorative trellis or lattice to serve as screening when the vine is dormant in the winter. The honeysuckle vines Dropmore scarlet and goldflame can grow in the shade and bloom for the majority of the summer.
Although fiveleaf akebia can tolerate some shade, it tends to put out runners and become aggressive in sunny areas. I’ve also observed Arctic beauty kiwis flourish in light shade.
Once established, all of these will require frequent pruning. For best flowering, clematis prefers full light for at least six hours.
For the first year or two, think about growing an annual vine alongside your permanent vine. The trellis will be swiftly covered by the annual. The perennial vine will offer yearly screening once it is established.
For a longer flowering period, many gardeners still mix annual and perennial vines.
Are drainage rocks required in raised vegetable beds? What kind of wood is best to use for these beds?
A. Raised bed bottoms don’t need to be filled with stones. In rare instances, this may even cause drainage problems. To eliminate the requirement for potting soil, many landscapers and gardeners fill the bottom of planters with stones and other materials.
Raised beds constructed on solid ground should include a drainage hole of some kind and be deep enough (at least 12 inches) to fit the plants you are growing.
When installing a raised bed in these places, prepare the soil surface by raking it or cover grassy sections with several layers of newspapers (it kills the grass). Because plant roots can penetrate the ground beneath a raised bed, these can be shallower.
To build the raised beds, think of utilizing naturally durable untreated hardwood, plastic or composite lumber, or interlocking stones. All of these are durable and secure for you.
I buy herbs every year to grow in pots, but my cilantro always sets seed before I can harvest it. Since they receive direct sunlight, my other herbs—basil, parsley, and thyme—do nicely. Why am I misusing this?
A. You are acting appropriately. Cilantro thrives in full sunlight, blooms, and sets seed in warm climates.
Like the leaves, the blossoms can also be used in salads and salsas. Allow a few seeds to grow. The seeds, sometimes known as coriander, are used to season soup and chili.
Try some of the kinds that can withstand higher heat, like Slo-Bolt, Leisure, Santos, and Caribe. Delfino, the All American Selection winner from 2006, has lovely foliage and fantastic flavor.
Another strategy for extending your cilantro harvest’s leaves and seeds is to plant a second seedling.
Sedum death due to Roundup?
Thank you for using Ask an Expert, and good morning. I’ve included some advice on how to get rid of creeping sedum, but proceed with caution since it can also destroy other plants.
Sandalwood soils with low fertility can support dense mats of mossy stonecrop. As with any lawn weed, identifying and addressing the cultural factors that encourage particular weeds in the lawn will unquestionably result in greater control than any one pesticide application. Broadleaf herbicides for turf can be especially tough to control mossy stonecrop. Soil health, fertility, and organic matter enhancement can all work very well with herbicide application. Herbicides that contain 2,4-D, dicamba, MCPP, MCPA, triclopyr, or mixes of these active components can exert some control when blended with desirable lawn grasses. Applications must be made repeatedly. The greatest option for controlling big, established patches of weeds may be herbicides that include glyphosate (Roundup, among others). Keep in mind that glyphosate is non-selective and will kill any present beneficial grasses.
Try slowly hand-pulling the sedum out before using the aforementioned approach to ensure that all the roots are gone. Apply the aforementioned technique carefully, making sure to target the sedum exclusively.
How do I get rid of the cacti in my yard?
The greatest time to control purslane weed is while it is young. They can actually throw their seeds far from the mother plant and infest a number of other areas of your garden if you let them mature to the seed stage.
Purslane can be removed most effectively by hand pulling. Since a single purslane plant typically covers a big area, you can quickly remove purslane weed from broad regions with minimal effort.
These plants can also be treated with herbicide, however it is most effective when applied to young plants.
The difficult aspect of managing purslane is not getting it out of the garden. Keeping purslane out of your garden and yard is the challenging part. A mature plant has the capacity to scatter its seeds distant from the mother plant, as was already indicated. Purslane can also re-root from any of its stems or leaves. New growth can emerge from even a small fragment of the plant remaining on the soil.
Purslane can also continue to ripen its seeds after being removed from the ground, which is another bonus. So even if you discard the purslane in your trash or compost pile, it will continue develop and release its seeds onto the ground in your garden.
Additionally, purslane seeds can remain in the soil for years as they wait to be exposed to light once again in order to germinate. As you can see, this weed is a survivist among plants, which makes controlling purslane challenging.
Taking all of this into account, be careful to dispose of the purslane appropriately while removing it. Before discarding purslane weeds, place them in a paper or plastic bag. To avoid the plant re-rooting, make sure you completely eradicate all purslane from a given region.
A thick layer of mulch or paper covering a previously affected region will help get rid of purslane because the seeds need light to germinate. To prevent the fresh seeds from germinating, you can also use a pre-emergent herbicide.
Once you understand how purslane survives, getting rid of it permanently will be simple. Making sure that the purslane weed and all of its seeds are removed from the garden is all that is necessary to effectively control purslane.
Please take note that any suggestions made regarding the usage of chemicals are provided solely for informational purposes. Since organic methods are safer and more environmentally friendly, chemical control should only be employed as a last option.
Sedum Care
Sedum plants, often known as stonecrop, do best in full sun, with little to no water, and, most critically, on soil that drains properly. For the flower bed and border, there are larger kinds that reach heights and widths of exceeding two feet. Old favorites for cottage gardens include “Fall Joy. Bright green, gray, and red ground cover kinds that spread swiftly and blossom in the early summer include “Angelina. everything in between as well! They are excellent container plants and do well in most gardens. Sedum plants feature succulent leaves that can be any color—gray, green, purple, blue, or even variegated—and can have anything from tiny needles to larger, fleshier leaves. Bees and butterflies adore them. The nicest part is that they are perennials and return year after year.
Here are a few expert recommendations for growing sedum plants that will look their best:
- Use a well-drained soil at all times. If you’re planting them in containers, make the soil mixture very permeable by adding some shredded bark or sand. Grow them in raised beds and containers if your garden soil is heavy, or amend it.
- Consider how the plants will feel while selecting your containers. To fit the modern vibe these plants exude, think concrete, stone, or simple round bowls if you want to create a succulent garden effect. However, don’t let that deter you from utilizing them in any type of garden—this is a fantastic way to modernize!
- Although they can go without water for extended periods of time, I find that if they are in well-drained soil, they look their best with moderate watering and a little bit of drying time in between.
- They don’t need rich soil or substantial fertilizers. Your plants will really become floppy with lots of stems but few leaves and blossoms if you overfertilize.
- Although the larger kinds will fall over if they don’t get enough sun, they can tolerate some afternoon shadow.
- Speaking of taller types, snip off the tops of the main stems in the spring when the plant is about six inches high. This will make the plant grow more tightly, which will solve the flipping over problem I stated earlier.
Try out various varieties of hen and chicks to plant with your sedums after you have the caring for them down. They are excellent sedum companion plants because they share the same needs for water and fertilizer. These are known as Sempervirens in Latin, so you can be sure you are purchasing the correct succulent. They look fantastic together in containers, as this image from “Sunset” demonstrates.