As we are in the mid-summer, many fields in the low desert region are preparing for soil solarization. Soil solarization is a widely adopted pest control method by organic growers in the low desert region. With the increase in organic production acreage...
This week much of California is under a heat advisory or excessive heat warning, with high temperatures estimated to range from 90 to 108 degrees. Many home gardeners are wondering how they can help their plants, trees or shrubs survive the intense summer heat.
“We are getting a lot of inquiries around the state from people worried about how the extreme temperatures are going to affect the plants or trees in their yards,” said Missy Gable, director of the UC Master Gardener Program. “With a little extra planning, you can help your garden beat the heat and survive the hot summer weather.”
UC Master Gardener volunteers are available to help answer gardening questions and provide advice on gardening during the hot summer months. Here are four quick and easy ways to help make sure your plants and trees not only survive, but thrive.
- Don't fertilize plants or trees during hot summer months
Fertilizers aim to increase the growth of plants and trees. When a fertilizer is applied, especially one that is high in nitrogen, a plant is triggered to produce more green growth. An increase in growth means an increase in water and nutrient needs. During hot spells, it is especially hard to keep up with plant water and nutrient needs as soils dry out quickly and water may not be readily available. Save your plants (and yourself!) from stress by stopping fertilizer application before hot weather hits.
- Water trees deeply and less frequently
It sounds counter intuitive to water trees less frequently, but this is exactly what UC environmental horticulture experts recommend. “When watering trees you want to consider the roots below the tree and you want to encourage a network of deep roots. If you are only watering for short periods at a higher frequency, the roots will remain shallow since that is where the tree finds its water supply,” said Janet Hartin, UC ANR environmental horticulture advisor. “Deep roots mean a healthier tree that is less susceptible to disease.”
How much water a plant needs depends on the specific plant, how long it has been in the ground, and the type of soil where it is planted. In general, young plants or newly planted plants require more water than older more established plants. Clay soils absorb water slowly so watering can take longer but is typically done less frequently. This is in contrast to sandy soils that moisten and drain quickly. Typically, watering sandy soils take less time but has to be done more frequently. A Landscape Irrigation Scheduling Worksheet from the California Center for Urban Horticulture (CCUH) can be used to help calculate and determine an annual irrigation schedule for one irrigation zone.
- Mulch, mulch, and more mulch
When temperatures get extreme, having a good layer of mulch prevents soil from heating up excessively and loosing water to evaporation. Apply 4 inches of a medium shred bark mulch to insulate the soil. This protects the fine roots that plants use to feed from the surrounding soil. Mulch also helps maintain healthy soil ecology with earthworms and other de-composers that promote nutrients and oxygen in soil. Finally, mulch will pay for itself by maintaining a more consistent soil moisture so you can water less and have better success with your plants. Be sure to maintain the depth of your mulch to ensure you can benefit from all the services it provides.
An important part of gardening is planning for activities in the garden for future months. When the temperatures are too hot to spend outdoors, you can always start to develop a garden or planting plan. (Photo: Melissa Womack)
- Wait to introduce new plants or trees until the fall
In gardening, timing is everything. New plants, whether grown in ground from seed or planted in your landscape from a container, have smaller root systems than more mature plants or plants that have been growing in your landscape for some time. Because root systems on new plants are smaller and need time to develop, these plants require more water more frequently. New plants introduced into a landscape during hot summer months have a significantly higher rate of failure. In California, it is best to introduce new plants in fall when the weather gets cooler. Winter rains can help keep new plants watered so they can establish and thrive in the future when temperatures are high and rainfall is scarce.
Always remember that you should take precautions for yourself while gardening in the summer months, especially during a heat wave. Remember to drink plenty of water and always have at least one quart of water per hour of outdoor activity. Limit time spent outdoors during peak temperatures and schedule any active time during cooler portions of the day. Always wear light loose clothing, a brimmed hat, and sunscreen as protection.
Thankfully we're not trying to garden on the surface of the sun. Unfortunately, sometimes it can feel like it for us and for our plants. Stay cool with these tips and consider planning for the fall to be an important part of your summer gardening activity.
UC Agriculture and Natural Resources marked the opening of a new conference and laboratory building at its Intermountain Research and Extension Center in Tulelake July 26, bringing to the region a state-of-the-art facility for business meetings, job fairs, trainings, conferences and community events.
"The facility is the first in the Tulelake area to offer modern audio-visual infrastructure and high-speed internet connectivity capable of supporting remote presentations to stay in touch with groups from around the world," said Rob Wilson, IREC director. "We hope this facility will greatly increase the visibility and accessibility of local events and help draw more regional attention to the area."
UC ANR funded construction of the $2 million building. IREC is working with the community to complete the project with furnishings and equipment.
The conference room is named after John Staunton, a local farmer and supporter of IREC whose family donated $25,000 in his memory to the project. Another conference room bears the name of Winema Elevators/Western Milling for its gift of $15,000. Donations to the facility have also been made by Sensient Natural Ingredients, Macy's Flying Service and Basin Fertilizer
The conference building opening followed the 2018 IREC field day, an annual event that showcases the research underway at the 140-acre facility.
Research presentations included updates about work on biological control of cereal leaf beetle, influence of fall harvest management of irrigated grass hays, onion white rot, managing alfalfa weevil and clover root cucurlio, pulse crop options for the Klamath Basin, cover crops and amendments, cutting schedule effects on low lignin alfalfa and germplasm evaluation of alfalfa and tall fescue.
I was inspired by Sarah Morran's blog post "Introducing new researchers in the UC Davis Weed Science Group" and decided to look at the other end of the spectrum. Introducing retired researchers in the UC Davis Weed Science Group Lars...
Links below about the 2018 UC Weed Day event: First the video: https://youtu.be/XkUT_uSbxak Produced by the University of California Division of Agriculture and Natural Resources (UCANR) Communications group posted a great video that...