California’s drought epidemic has killed more than 12 million trees in the last four years. The perpetual heat and lack of rain continuously causes trees to die in California’s national parks and is now moving to urban parks, tree-lined streets and neighborhoods.
Learn how to monitor your trees during drought below, where Davey Institute Technical Advisor Len Burkhart, who is based in California, shares signs of drought and solutions to protect our most valuable natural assets--trees. Here are some of his tips to detect whether your trees are being affected by this on-going dry spell.
Look Out For These Drought Signs:
- Leaf loss
- Leaf wilt or leaves will start to curl
- Scorched, gray-tinted leaves
- Thinning canopy
- Branches drying out and dying
- Wood-boring insects
- Pine tree discoloration (Pines turn grayish-green color and then turn into rust once dead.)
If you see these drought signs in your trees and landscape, follow the tips below and contact a professionally trained Davey arborist for a free consultation to assess the health of your tree and treatment options.
10 Steps You Should Take During a Drought:
1. Follow all water rules and regulations. Know watering regulations set by your community, water provider and/or water district during drought season. Be conscious and considerate of these watering rules.
2. Be water-wise. Do not use excess water during a drought. Know how much water your trees and landscape need to survive and water accordingly. Water using 5 to 20 gallons, depending on the tree species, once or twice a week.
Here’s a watering tip for clay-based soil: Dig approximately 4 to 6 inches into the ground near one of your trees after watering. Form a ball of dirt in your hand, if water squeezes out—you watered too much. You should not have mud residue on your hand.
3. Water at the right time. Water between 6 p.m. and 10 a.m. in order to maximize water’s effectiveness. Watering during the day allows for quicker evaporation, minimizing the amount of water that gets to your roots.
5. Water newly planted trees first. New plants and trees in your landscape require more water than mature plants. Sustain new plants while caring for the old in order to create lasting impressions with your landscape.
6. Delay further planting until fall. Hold off planting new trees and plants in your landscape—to conserve natural resources.Reassess drought conditions in the fall for future plantings.
7. Invest in rain barrels. Use rain barrels in and outside your home to collect excess water. Use rain barrels indoors to gather water from leaky faucets or drains and use barrels outside to collect rainfall and dew.
8. Re-use recycled water or gray-water. We use water every day for numerous activities from showering to washing our clothes and dishes. You can save surplus water or “gray water” from sinks, showers, tubs and washing machines by installing various filtering systems.
9. Inspect irrigation systems. Burkhart recommends checking your irrigation system once a month for blockage and breaks. Make sure when watering plants that the water doesn’t hit trunks or stems of the trees and plants because it increases the chance of trunk cankers and root-rot diseases. Remember to put the water where the roots are.
10. Create drought-prone (or drought-resistant) landscapes. Make sure to research trees and plants that are native to your climate before planting. Drought-prone trees and plants will save you water and stay alive longer—creating lasting benefits.
What NOT to Do During a Drought:
- Water hardscapes
- Water on windy or rainy days
- Use water with high salt content
- Water the trunk of trees (This may cause trunk cankers or lead to root-rot diseases.)
For more information about drought tree and landscape care, check out Colorado State University’s Watering a Home Landscape During Drought article.
Worried your trees and plants are becoming victims to drought? Schedule a free consultation with your local, professionally trained Davey arborist.