If my high school geometry is still intact the trees above should be to the north of the slope which should allow light into the area. I've just planted out a steep bank from where the land was excavated for an arena. If your hillside is really steep like mine, you will automatically create curving footpaths across the slope as you plant & water. Millions of ‘Katrinus’ plants are used Australia wide. How Planting Trees on a Hillside Helps with Soil Erosion Finally, not to confuse you, but for an intensely colorful look you could plant the bank with Plumbago ‘Royal Cape’ or P. ‘Imperial Blue’, bougainvillea ‘La Jolla’, and Lantana ‘Radiation’, with yellow trailing gazanias filling in the blank spots between. The roots took off and it held up fine through the rains. Plant roots are very efficient at anchoring loose soil on a sloped flower bed. When planting close to a swimming pool, choose plants that are clean and won’t drip leaves, flowers or debris into the water. The best plants for erosion control are drought-tolerant, have extensive fibrous roots, and feature spreading foliage to slow the velocity of heavy rain. I am so glad you wrote me since it is not a good idea to cover a slope with Japanese honeysuckle. Tommy Cowett Shows the process of designing and installing a landscape for a steep slope. Lantana is one of the best shrubs to plant near swimming pools that will survive longterm and hold a bank. My main concern is finding plants that will help control any future erosion of this bank that leads to the pool, while being visually pleasing as well as “pool friendly”. When these start to establish, plant shrubs and trees. In winter, it's less attractive: I did this in one garden with a short but steep bank, and each winter I would go along the top and cut off all the old black growth. Why should you plant a California native plant community on the slope and not grass or ice plant! Thank you for suggesting that I provide some ideas for Cailfornia native plants that can be used to control erosion on steep banks. I say that we have to remove the fluffy decayed bark, apply a good grade of topsoil and plant something that will develop a good root system to hold the bank, that does not need much sun, would enhance the beauty and be easy to maintain. Continue Reading, Gardening Question From Crystal: I am going to be doing some container gardening this summer for the first time. Plant native grasses to hold the soil in. ), Gardening Question From Molly: Hello! I know that our problem is a challenge, but I know from my past questions, that from my former requests that you can handle this one. The only problem is that aphids love this plant and in some locations it’s prone to mildew. The best plants for erosion control are drought-tolerant, have extensive fibrous roots, and feature spreading foliage to slow the velocity of heavy rain. You could then landscape the bank in an artistic way with rocks, trees, shrubs and perennials and a winding path or steps for reaching them. However, on steep slopes and embankments, there is the elevated risk of erosion. I hope whoever cleaned off your bank left the roots of the plants in the ground. I laid left over old hay between the plants to help stabilise it till the flax take hold and to slow down the weeds coming through. Difficult to access, prone to erosion or dry soil, banks and slopes can be challenging for most gardeners. This seems to be a terrific addition for my raised beds. This is because not only could this make the area that has been eroded barren, but it could also adversely affect water supply and introduce pollutants. This area is very hard to maintain and dangerous to mow. Several named varieties of honeysuckle can be purchased from Monrovia wholesale nurseries by your local retail nursery. to 15 ft. to our perimeter fence. Would you please let me know if this is a good idea. For any of the above groundcovers, we recommend planting 2 ½ “ pots, or even better a plug, 9” to 12” apart on center. Many are colorful and easy to grow in California and easy to grow on banks. The 1990 flood event left a steep 10 to 15-foot high raw embankment along the Hamakami Strawberry Farm. You wrote me three days ago asking if you should plant Japanese honeysuckle (Lonicera japonica ‘Halliana’) on a bank. There's also poplars. cover and stabilize the entire streambank/shoreline and secured in place. Many thanks for this excellent comment. Erosion Control Methods Grasses and Grass-like Plants Turf grass is the least effective type of grass for stabilizing a pond bank slope. Plant it immediately from flats and install a low-impact sprinkler system or drip irrigation and you will be amazed to see how quickly it covers the bank in growth and bloom. Plants to stabilize a steep bank in South Carolina January 09, 2010 I would like to use native plantings to stabilize a steep bank. You can also choose native plants with different bloom cycles for year-round color and variation. Create a buffer of native plants between your ornamental garden and the edge of a steep slope. It is also deer resistant. On very steep sites sowing may not be an option. learned to spray BT. Summer irrigation can kill it. Add a few decorative trees such as Desert Willow if you are willing to handwater. Shallower roots hold the surface soil. Further Information. Large slopes need a lot of groundcovers and the Fire Department likes to see fire-resistant succulents rather than sages. Turf grass is often a choice but consider the maintenance difficulties. Continue Reading. Watch this video to find out more. But like usual, trees can help! Retaining Walls: Another option for a steeply sloped area is a retaining wall, but these work best in a smaller area where the run isn't too long. On three sides of the development, we have steep banks sloping down to our units varying from 40 to 45 degrees. Plants have been reported to grow well in Zone 5 but with little flowering due to frost damage. Add shadecloth or treeguards if possible to shade new tubestock from searing sun. Release the ladybugs onto the bottom of the bank at dusk after watering and after chilling the ladybugs in the refrigerator for a couple of hours. If you decide to go along with my suggestion on Ceanothus, I also suggest you consult a book called simply “Ceanothus” by David Fross and Dieter Wilken. On three sides of the development, we have steep banks sloping down to our units varying from 40 to 45 degrees. They are native to South Africa. In areas where snow cover offers a layer of insulation, the flower buds often go undamaged. Terraces should be slightly sloped perpendicularly to the hillside to allow for run-off. Cut holes all the way through the panty hose for plants. Continue Reading, Gardening Question from Debbie: I have this pot outside in my garden in a location where it receives morning shade but direct sun most all afternoon. Pioneer plants like Bleeding Heart (a low bushy plant with tell tale heart-shaped flowers) and Sarsaparilla (a climbing vine plant) can then be considered. Steep banks with slopes greater than 3 to 1 (3 feet of width for every foot in height) are almost certain to erode and undercut over time if they are not stabilized. You can check Craig’s List for homeowner Aloe cuttings & pups. I have a currently stable slope, but have just installed an in-ground pool and am now researching landscaping options for the slope and the rest of the yard. Plants for steep slopes Steeply sloped sites have many inherent issues, including soil displacement, erosion and the obvious safety challenges of working on potentially unstable, banked ground. On one street in particular, which is the 45 degree slope, has a bulkhead varying from 4 ft. high, down to 2 ft. high. Taller than the above lilac varieties is C. ‘Julia Phelps’, which is particularly stunning planted on a steep bank next to flannel bush (Fremontedendron ‘California Glory. I’ve seen banks languish for years with that ugly jute showing and the plants struggling to survive many years after they were planted. Forget standard recommendations or you will need to do a lot of hand-watering or replanting. Due to the low bank position of the turf reinforcement mats, we decided that pre-vegetated coir logs would provide sufficient long-term protection. The bank is on the side of the gravel road I cut back into the woods and around a 36" pipe going under the road to allow the free flow ... View Mr. Smarty Plants' Answer Thanks, and grew on the following year. A.  Holy Rubik’s Cube Batman – You’d make the Riddler blush! You would not need to pull out the gazanias but plant into them with other taller plants such as Pride of Madiera (Echium candicans), for example, if you live near the coast. It was built in a vacated gravel pit. Plant it in fall and just spritz the foliage with a little spray of water in the evening of hot dry days in summer to make the plant feel as if it has been moistened by a light shower or heavy dew. Creeping junipers ( are the problem-solvers of the plant world. Some great options and cautions are discussed in this article. That’s why I didn’t recommend jute. In back of the bulkhead, the 45-degree slope varies in the length of the slope from 10ft. I want to upgrade the containers which are currently plastic buckets. Figure 7 . Don't think that you are limited to ground covers (perennials and short shrubs that grow … If there is no pathway around the swimming pool on that side, however, this wall can go straight up from the edge of the pool. It is invasive and spreads by seeds that are distributed by birds. There are three general approaches to bank stabilization: • Live Planting • Bioengineering • Hard Armoring The best method for stabilizing and protecting your streambank or shoreline depends upon your specific situation. How steep do you mean? Large trees, especially, can move large volumes of water. ¥ Prevent surface erosion on steep slopes ¥ Increase native riparian vegetation and habitat ¥ Stabilize small creek banks ¥ Divert and/or absorb runoff ¥ Minimize and prevent bank failure Soil-bioengineering has many benefits over more conventional engineering solutions, such as: ¥ Reducing maintenance costs Control aphids by spreading ladybugs in early spring as soon as you see the aphids. Another idea is to cover the bank with gazaneas. There are many others besides. Planting them up with the right plants will help counter erosion, slow water runoff, provide quick coverage and reduce maintenance. It is susceptible to deer browse but this may not be too great of an issue since you will want to cut them back each season since they are grown more for their colorful red stems (which disappear with age) than their flowers. As a result, over the following years, the farm lost a significant amount of land to the river meander that was moving rapidly through the property. Another idea I have for planting right now for a quick and colorful cover that would last forever is lantana. The leaves of the plants also help to reduce the velocity of raindrops falling on the ground, making it harder for them to dislodge the soil and erode it. Gazanias are available for sale at virtually all nurseries except specialty nurseries. Cover the slope and panty hose with a thick layer of mulch. Low-growing groundcover plants are best to maintain soil stability and minimise erosion. The decayed bark slides down and over the bulkhead in places. Start by planting desert trees at the upper level such as Palo Verde (long tap root to stabilize soil), provides 25% shade during the summer. The only thing that has been done to this area in the past is put down a rope type netting and bark on the rock, sand & gravel, then try to get ivy to grow, by only putting soil in each hole that a ivy plant was planted. Layers of indigenous compost, mulch and pine needle/leaf litter are … The 1990 flood event left a steep 10 to 15-foot high raw embankment along the Hamakami Strawberry Farm. If I were you I would not mix native plants with trailing gazanias if that is what you were planning. I planted a whole steep bank myself once in late summer when I was young and then I kept it watered daily by sprinkling with the hose. Just decide quickly and get going! If you’re into birds, and butterflies, using native plants will attract them to your bank. Just make a decision on which of these schemes to use, go out and buy the plants and get them into the ground post haste. Dot the steep slope with native, drought-tolerant shrubs (Toyons, Lemonade-berry, low-water Manzanitas). Another option is to plant one of the ornamental grasses like sweet grass (Muhlenbergia filipes) or switchgrass (Panicum virgatum). Whenever possible, choose species native to your region, as they require less irrigation and fertilizer, both of which contribute to harmful run-off. You would never be able to get rid of it. Standard recommendation is to hold the soil with grass (it dies in tough dry situations). Plants’ roots stabilize the soil from below, while vegetation above the ground prevents erosion. Q. I live in Lakewood in a large, beautiful gated condominium community of 65 single story duplexes. This method is installed above the normal stream flow and provides immediate protective coverage of the bank. This can be done by covering them with netting or a light layer of straw (not hay). In that case a wall is all the more necessary because it will keep all earth and debris from falling into the pool when you need to plant or maintain the bank. Tommy Cowett Shows the process of designing and installing a landscape for a steep slope. One thing you could do quickly is to plant the slope solidly with gazanias for erosion control, and then later think of deeper rooted plants to put in with the gazanias. There are a number of varieties including one called ‘Graham Thomas’ that has white flowers that turn coppery yellow as they age. Planting them up with the right plants will help counter erosion, slow water runoff, provide quick coverage and reduce maintenance. It was built in a vacated gravel pit. Continue Reading, Gardening Question From Martha: I have access to a commercial mushroom farm that makes its spent mushroom medium available at no charge to gardeners. Plant grass — Planting grass does not stop erosion, and it’s been found that 30-75% of all rainfall on grass- covered slopes runs off. The local nursery worker did not know what BT is, so I… Mowing is challenging and water will simply run off this high moisture loving plant. Plant desert groundcovers such as groups of Agave Angustifolia for holding soil on steep slopes, spikey A. Geminiflora grouped together gives the illusion of a grassy meadow. Choosing plants for slopes . The ice plant will not regrow from the roots once the top of the plant is removed. Deep roots hold and stabilize several layers of the soil profile. There's also poplars. Your retaining wall should be about 18 inches to 2-feet high and can be as simple as a concrete block wall, covered with stucco and topped with red tile. If you have a steep hill in your landscaping, you owe yourself a look at this ground cover. Posted on June 24, 2006 by Horticulture Guy - Peter Punzi. Buffer width depends on the size of the lot, with an … Plants’ roots stabilize the soil from below, while vegetation above the ground prevents erosion. One year I didn't get time, and it simply sat there all winter (not to my taste, but the client didn't seem to mind!) Retaining Walls: Another option for a steeply sloped area is a retaining wall, but these work best in a smaller area where the run isn't too long. Both plants are excellent choices in locations where aesthetics are important. Filtrexx® Bank Stabilization is a vegetated soft block™ system designed to stabilize banks and prevent erosion of riparian areas, waterways, and shoreline banks. Soil erosion happens when rain washes away tiny bits of topsoil that contain the most nutrients. Q. I live in Lakewood in a large, beautiful gated condominium community of 65 single story duplexes. I replied that it is too invasive and you will never get rid of it, but it went through my mind that I should also have suggested another honeysuckle that might be less invasive, though possibly more deciduous, dropping leaves if there is a hard frost. If you haven't any particular plant choice, then how about periwinkle, to clothe the bank and root into it. (Native), Red Osier Dogwood (Cornus sericea or C. stolonifera) great soil stabilizer and has beautiful red stems. Virtually all species and selections of ceanothus are recommended for erosion control. Among the best selections and varieties for this purpose are Ceonothus gloriosus ‘Anchor Bay’; Carmel Creeper (C.g. Tiling the front of the wall is a particularly good idea if there will be no path on that side of the swimming pool. Standard recommendation is to hold the soil with grass (it dies in tough dry situations). But in your situation, I would get these plants into the ground as soon as possible. The flat area also makes it easier to add a 5-10cm layer of mulch, which will to conserve precious moisture. On three sides of the development, we have steep banks sloping down to our units varying from 40 to 45 degrees. Be sure to water well, when using jute mesh. ‘Yankee Point’. Thank you for your above recommendations. They slow erosion both above and belowground with their roots and their foliage. The more it rains, the more natural nutrients your plants lose. Lay a tall ladder flat on the ground when you plant the bank so you can get up and down it. I laid left over old hay between the plants to help stabilise it till the flax take hold and to slow down the weeds coming through. Our bottle may be 5 years old. You don’t mention where you live, but need to be aware that no plants can be planted and forgotten. Kids are likely to use it for jumping into the pool, and the tile front will make it look as if it’s a part of the swimming pool. I tested the soil this year and it still shows too alkaline. We have developed innovative techniques (low impact, low profile, low maintenance and low cost) to re-establish PERFORMANCE OF stability, STORM WATER MANAGEMENT AND HABITAT. Time is of the essence. Anything you can get to grow there will perform the same function. Buffer width depends on the size of the lot, with an … Question from Alin: They are so good for colonising well and holding up the bank. One anomaly I notice is that you say that the slope is to the south and there are trees above which shade the slope. The Lafayette, Calif., "Homeowners Creek Guide to Maintenance, Repair and Planting" reports that willow trees are the best choice for easy establishment of creek bank vegetation. )—Make sure not to water flannel bush in summer. Terraces: If the area is large and your slope is at least 30%, creating terraces would be a good plan for making more level planting, recreation, and seating areas. They remove water from the soil and carry it up into their tissues and release it as water vapor into the air (evapotranspiration). I once toured a mushroom… Buy compost… The deeper-rooted plants will have struck roots into the ground and should be holding the soil deeper down while the gazania should be covering the top. For more ideas, why not look online or in a book store for books on landscaping near a pool. I’ve purchased 4 15-gallon containers of Pandorea Jasminoides – Bowers Vine – that I want to train onto my wooden fence. Plant selection depends on individual taste and what would best suit the area. O yes, I forgot, we have deer that do get hungry and are a nescience to our residents growing roses etc. Dear Pat, I am living in L. A. I have a steep hillside which just get cleaned up. Choosing Plants for River Banks. I find lady bugs work very quickly to clear up aphids, within a week they can be gone. Tasred® Dianella tasmanica ‘TR20’ PBR: Dense tidy appearance with beautiful wide leaves and large purple berries in spring and summer. There is no irrigation currently, however there is the option to install irrigation if needed. I've just planted out a steep bank from where the land was excavated for an arena. Selecting the right plants for the job, taking time to plant them properly, watering until they establish an extended root system and a little patience can produce a stunning sloped landscape. Here are two ideas and caveats in order of my preference: Salal (Gaultheria shallon) native evergreen tolerates shade, sun, moist or dry soil. It did well for a while; then all leaves dropped but coming back now… Our neighbors along the perimeter fence above have tall evergreen and leafed trees shading this area most of the day. Each year it is cut back during the dormant season to maintain the red stems. Can you suggest some plants that will flourish while helping to control erosion? You can mix colors up if you like for a patchwork look. Soil Type: The consistency of the soil also determines rate of erosion. I would lean toward soil stabilizing shrubs. On one street in particular, which is the 45 degree slope, has a bulkhead varying from 4 ft. high, down to 2 ft. high. Erosion Control (video) How to Landscape a Steep Hillside on Your Yard (video) How to Plant Ground Cover to Prevent Erosion (video) Both books are illustrated with informative photos. I have indeed recommended many plants as bank covers that are native to Australia, South America, the Mediterranean Basin, and South Africa. Steep banks with slopes greater than 3 to 1 (3 feet of width for every foot in height) are almost certain to erode and undercut over time if they are not stabilized. In fact, strawberries from the farm were literally falling into the river channel. Also, seeding a bank with grass creates a weedy slope that is hard to stabilize and makes reestablishing plants much more difficult. I planted a whole steep bank myself once in late summer when I was young and then I kept it watered daily by sprinkling with the hose. Dropmore Scarlet honeysuckle (Lonicera x brownii ‘Dropmore’) can also be used as a ground cover and it is a hybrid with brilliant summer bloom that brings hummingbirds but has few if any seeds to be spread by birds. Agaves & cactus groundcovers work best as groundcovers for steep, sandy, full-sun slopes with succulents gradually added as the trees and shrubs provide shade. If your local nursery does not have the cultivars you need in stock you can order your desired variety or varieties in flats. The turf could be killed but left in place to stabilize the slope while the new replacement plants establish. You can mix the flower colors or just have one color. Terraces: If the area is large and your slope is at least 30%, creating terraces would be a good plan for making more level planting, recreation, and seating areas. Careful planting successfully addresses both the aesthetic and practical landscaping challenges that a steep bank presents. All trailers have gray foliage and all the newer ones have larger flowers. Other native shrubs that are useful for controlling erosion on steep banks include lemonade berry (Rhus integrifolia), dwarf coyote bush (Baccharis pilularis), Bush anemone (Carpenteria californica), Western redbud (Cercis occidentalis), island bush poppy (Dendromecon harfordii), toyon (Heteromleles arbutifolia), and coffee berry (Rhamnus californica). This is primarily because plant roots tend to hold soil together, making it harder to erode. In fact, strawberries from the farm were literally falling into the river channel. Do they overhang the slope? Terraces should be slightly sloped perpendicularly to the hillside to allow for run-off. It was built in a vacated gravel pit. Plants to stabilize a steep bank 0. Forsythia. Geranium macrorrhizum, geranium renardii (sun)alchemilla mollis (I know, it's a bit invasive with its babies, but it roots well into almost anything). 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