“Where does the water go?”
That’s a question I frequently ask myself while bicycling throughout the region, staring at rain-soaked suburban yards. This is also a question homeowners should ask themselves before, during, and after the rainy season.
One of the best pieces of advice I can offer any new homeowner: before you spend any time and money on landscaping projects or a garden, live with the existing property for a year. This allows you to take monthly pictures of the area where you want a future garden, perennials, shrubs and trees.
When we moved to our new home seven years ago, that’s what we did before we embarked on a totally redesigned landscape. Taking a series of pictures on a regular basis on sunny days, especially at different times of the day (9am, 1pm, 5pm), will remind you how much shade your future plants will be dealing with, and you can plant accordingly.
A plant labeled for “full sun” will need at least six hours (preferably eight hours) of direct sun a day. “Part Sun/Part Shade” plants, 4-6 hours of sun per day. “Shade” should be reserved for those plants that get little direct sun (less than four hours) and preferably dappled sun, such as protection from an overhanging deciduous tree.
However, the more important reason to live with that new yard for a year before embarking on outdoor landscaping projects: figure out where water goes, both after regular irrigation and after rainstorms. In our case, we discovered that few of the yard sprinklers worked fully or accurately, and that a heavy downpour of rain ends up in the garage. And the basement would flood.
As a result, the price of our landscape rehab zoomed upward, to include a complete drip irrigation system for both the front yard and backyard, as well as an underground hard pipe drain system to move roof gutter water away from the house and garage to another part of the yard. You can hear more about how to do that in the podcast above, with landscape designer Michael Glassman.
Home and Garden Pests That Sing in the Rain
The other problem with wet weather: some home and garden pests love it when it’s wet; and others will seek refuge in drier quarters, such as in your home.
The authors of the University of California Ag and Natural Resources publication, “Pests in the Urban Landscape,” offer some “Wet Weather Do’s and Don’ts” to ward off problems:
• Check for snails and slugs. They like it moist and will sing in the rain. Unfortunately, their singing sounds a lot like, “chomp, chomp, chomp.” These garden leaf and flower munchers don’t like it too wet. They may be easily found headed for dry land – sidewalks and driveways – during a deluge. Find them under loose boards, as well. That’s the time for hand-picking or stomping them. Chemical controls for these mollusk family members are ineffective in the rain.
• Remove weeds and unwanted plants. When the ground is wet, pulling them out goes much more quickly. Among the winter weeds spreading here right now are oxalis, nutsedge and groundsel. You may have other cool season weedy invaders in your yard.
• Dump standing water. This wet winter is already favoring a big mosquito season ahead. Deprive breeding mosquitoes of water-nesting sites such as flowerpot saucers, wheelbarrows, buckets, clogged storm drains, and roof gutters.
• Check for ants, cockroaches, and earwigs. These pests may invite themselves into your home when flooding or heavy rains make the outdoors unappealing to them. Seal any cracks or openings in your home. Outdoors, check the perimeter of your home as well as around doors and windows for insect entryways. Weather stripping, door sweeps, and traps placed beneath eave-protected walkways can help keep them outside. Indoors, keep food tightly sealed and the counters clean, especially near electrical outlets that might provide an entryway.
• Remove yard mushrooms. Mild temperatures and wet soil are a combination that mushrooms and other fruiting bodies of fungi love. The good news is they are not harmful to your lawn and garden. The bad news? They can be poisonous to children and pets, when consumed. Rake them up.
• Don’t apply outdoor fertilizer or pesticides now. Both are easily susceptible to being washed off the soil or plants and into our waterways. Wait for several days of dry weather before applying any sprays, dusts, liquids, or granules.
• Avoid pruning plants unless it is to remove broken or damaged branches. Rainfall and open wounds in the winter on plants is a recipe for spreading diseases. Apricots, cherries, and olives should never be pruned during cool, wet, conditions, advises UCANR.
• A common site on sidewalks after a rainstorm are worms, struggling to get out of the wet soil and onto dry land. If you have easy draining soil, you may see their mounds in lawns and gardens as they come up temporarily for air. Those mounds are a great fertilizer: worm castings. Just knock them down with your foot or a rake to feed the soil.
• Tread lightly through the garden during or just after a rainstorm. Avoid walking, driving, or moving heavy equipment across wet soil. This compacts the soil, removing necessary air pockets, which are vital for healthy trees, shrubs, and other plants.
• One other tip: if you have slow draining areas of your yard after a deluge, mark them. Stick a small stake or object on top of those areas to let you know that the area needs drainage help after the rainy season. Avoid planting in consistently wet areas. Consider putting in a drain system to move that water to another part of the yard to make it more habitable for plant life. Or, consider placing a large container or raised bed in that area for a successful garden.
Thank you for listening to the Garden Basics with Farmer Fred podcast! It’s available wherever you get your podcasts. Please share it with your garden friends.
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Fred Hoffman is also a University of California Cooperative Extension Master Gardener in Sacramento County.
Drain That Rain!