
California Alder
Also known as
Rhombie leaf alder, California alder and White alder
Taxonomy
Alnus rhombifolia
Alnus
Betulaceae
Fagales

How to care for California Alder

How often to water your California Alder

every 9
California Alder needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.
Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Water 0.5 cups every
9

Check the growing potential in your area
A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for California Alder in your home

a window
California Alder love being close to bright, sunny windows 😎.
Place it less than 1ft from a south-facing window to maximize the potential for growth.
California Alder does not tolerate low-light 🚫.
Select your region to see how the current weather in your area affects the placement of California Alder in your home 🏡.

How to fertilize California Alder

Most potting soils come with ample nutrients which plants use to produce new growth.
By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your California Alder after it doubles in size or once a year—whichever comes first.

California Alder prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Sunlight Needs
California Alder requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.
Toxicity
Greg does not have confirmed data on this plant’s toxicity. If you, a family member, or a pet consumes plant material of unknown toxicity, it’s always best to consult a medical professional.
If you or someone else ingested this plant, call Poison Control at US (800) 222-1222. If a pet consumed this plant, contact your veterinarian or the ASPCA at US (888) 426-4435.
Soil
California Alder is very sensitive to dry soil, so choose a potting soil that retains moisture. A good soil will still drain well and contain lots of organic matter such as coco coir or sphagnum moss.
Fertilizer
California Alder is a fast growing plant and may deplete the nutrients in its soil over time. Replenish them with a gentle organic fertilizer or compost every 1-2 months depending on your location and season. Fertilize more often during the growing season and in warmer and brighter climates.
Growth Pattern
California Alder will branch off as it grows. To encourage branching, pinch off the newest growth at the tip and the stem will branch off into two.
Growing Outdoors
USDA Hardiness Zone
California Alder can be grown outdoors in USDA Hardiness Zones 8a-11b. Find your local hardiness zone here.
Care Summary for California Alder
California Alder
Greg recommends:

0.5 cups every 9 days

< 1ft from a window

Repot after 2x growth
Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.
