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irrigation

Gardening Video: Managing Water in Your Garden

September 27, 2021

Gardening in the Mountains presents:
Managing Water in Your Garden

Check out the latest gardening video on the Buncombe County Master Gardener website.  Explore cost-effective and environmentally sustainable methods for managing water use in the gardens of Western North Carolina where summer rain patterns can be too little, too much, or not at all. To access this video, click on the link below:

Managing Water in Your Garden

Or go to www.buncombemastergardener.org , click on the ‘Gardening Videos’ tab at the top of the page, and select the video from the list provided.

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Categories Gardening Videos, Water Management Tags irrigation, rainwater, stormwater management, waterwise gardening

Drought Tolerant Gardens: Take Steps Beyond Irrigation to Help Survive Low Rainfall

July 17, 2017

Gardeners are often frustrated in June and July as they expect well-performing, productive, and beautiful gardens. After all, it is the prime growing season. All is right, except that the rains are not coming. Drought is here.

Rain garden at N.C. Arboretum, Asheville
Rain garden at N.C. Arboretum in Asheville

Turns out that drought is a local thing, determined by the rainfall one receives on one’s own garden. Asheville (downtown) has the lowest annual rainfall of any recording site in North Carolina. Moving out from town, rainfall varies greatly on average and for any given year. Your garden may be experiencing a drought when others are not.

How does a gardener prepare for the inevitability of lower than expected rainfall—drought? Consider these eight tips.

Plan and design
Think about your garden. Garden design is the first order of business. The shape and slope of the site affects the water available to plants. Rapid drainage of soils on steep slopes reduces the water available to plants. Shade may increase the water availability, but shade trees themselves require large amounts of water. Grouping plants with comparable water requirements improves efficiency if irrigation is needed.

Improve soil
Soil type and texture determine water availability to plants. Plants, with very few exceptions, take up water through their root systems. Roots seek water in the soil. Our prevalent clay or clay-loam soils hold water well, but release it slowly. Soils may seem wet, but the water is not readily available to the plants. For many uses, especially for annual flowers and vegetable gardens, improving the soil with organic soil amendments will increase the available water.

Select appropriate plants
Gardeners love plants—sometimes exotic plants from the far reaches of the earth that require large amounts of water to sustain them. When selecting plants, consider the water requirements and your commitment to provide extra water when needed. Select low-water use plants. Native plants often adapt better to local conditions and can be more drought tolerant when fully established.

Use practical turf areas
Know your turf grass. Cool season grasses, the most common in our area, have two dormant seasons. Keeping a lush turf in midsummer is challenging. It may be best to let it go dormant, as it wants to be. Consider watering in spring and fall if the rains do not come for a more lush turf in cooler seasons. Secondly, consider reducing the area in turf. Large expanses of grass can require considerable irrigation, not to mention frequent fertilization and mowing.

Mulch
Covering the soil in garden areas with mulch reduces the loss of water to the atmosphere. Use non-dyed, organic materials only and cover deeply—three to four inches. Ideally, one would use only materials available on their property, such as decaying leaves and other plant materials. This is not always practical. An alternative is to grow soil-covering plants such as a groundcover.

Maintain appropriately
Keep beds and vegetable gardens free from competing plants (weeds). Cutting or pulling young plants keeps gardens neat and makes more water available. Consider using the pulled weeds as compost.

Rain barrels at N.C. Arboretum, Asheville
Rain barrels capture water at the N.C. Arboretum in Asheville

Irrigate efficiently
Irrigate plants when needed, but do so efficiently. Plants need deep water at the roots, but only when the soil is dry. Feel the soil with your hands to determine if it needs water. Spraying water over the tops of plants does not provide efficient watering.

Capture water
Create land shapes, install rain gardens, and use rain barrels to catch and take advantage of the rainfall that reaches garden areas. Move water to needed plants using gravity where possible.

Concluding thoughts
Gardening in drought conditions is rewarding if gardeners plan and act as if they expect dry conditions. If rains are above expectations, all the better. Being prepared rewards with better results.

Article written by James Wade, Extension Master GardenerSM Volunteer.

Learn more at upcoming event
On August 17, the public is invited to attend the Gardening the Mountains presentation, “Drought Tolerant Gardens.” James Wade, our speaker, will expand on the ideas he presents in this blog. Watch for an upcoming blog in early August announcing the time and place for this presentation.

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Categories Water Management Tags drought, irrigation, rainwater, waterwise gardening

Gardening on Slopes: What about Irrigation?

September 16, 2016

Because steep slopes tend to be dry, plants may need irrigation, at least until they are well established. The most effective way to provide moisture on slopes is by drip irrigation, either with soaker hoses or perforated pipe. It’s easy for a gardener to install soaker hose, but you’ll probably want to hire a professional for an elaborate irrigation system with timed zones and buried pipe.

Soaker hoses
If you choose to use soaker hoses, run regular garden hoses from your house hose bib to the top of your hill. Then connect your soaker hose to the garden hose at the high point. Snake the soaker hose back and forth across the slope, but keep it continuously moving downhill. Circle the soaker hose a couple of times around trees and large shrubs. For large areas, you may need several downhill soaker hose runs. Toggle switches can be used to switch the water flow from one hose to another. Use metal pins to secure the hose to the slope and then bury it under mulch. A good covering of mulch—such as ground hardwood or pine fines—will reduce your irrigation requirements by helping to retain soil moisture and keep plant roots cool. 

Steep slope gardening: irrigation with soaker hose system
Soaker hose runs across and down slope.
Steep slope gardening: soaker hose irrigation system with toggle connector
Toggle connector switches water flow among several soaker hoses.

How much to water?
The general rule for watering gardens is to apply one inch of water per week. It may take up to 1½ hours of continuous irrigation to distribute an inch of water through a soaker hose system. On slopes, it’s best to cycle the water flow on and off every 20 to 30 minutes. Water for 20 minutes, then let the water soak into the slope for 20 minutes, then water again for 20 minutes until you’ve applied the needed amount of water. On and off cycling reduces runoff down the slope and encourages more water to soak deeply into the soil.

Article written by Beth Leonard, Extension Master Gardener Volunteer.

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Categories Landscape Design Tags garden planning, hillsides, irrigation, landscape planning, slopes

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