California Goldfields
Lasthenia californica
Last reviewed: August 2026
Lasthenia californica is a low-growing annual forb with bright yellow flowers that carpet grasslands and open slopes across California and Oregon from March through May. It thrives in full sun with low water once established.

California Goldfields (Lasthenia californica) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org (opens in new tab), last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
4"–16" H × 4"–12" W
Bloom
Mar, Apr, May
Native to
CA, OR
Pollinators
bees, butterflies
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A low-growing annual wildflower that creates stunning carpets of bright golden-yellow flowers in spring. It thrives in full sun with minimal water, making it an excellent choice for water-wise gardens and meadow plantings. After blooming, plants naturally die back until next growing season.
Growing California Goldfields
Grow California Goldfields in full sun and low water. Mature plants reach 4 to 16 inches tall and spread 4 to 12 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.
How to care for California Goldfields, by region
How to care for California Goldfields where it is actually grown: year-round basics plus what to do each season, region by region, with the sources for each.
Care guidance last updated: July 2026
Central California Valley (includes Sacramento, CA)
Year-round
California Goldfields is a tiny golden annual wildflower that carpets Central Valley grasslands in spring. In Sacramento you grow it by sowing seed in fall and letting the winter rains do almost all the work.
- Treat it as an annual that lives one year and reseeds itself, so plan for a fall sowing rather than a spring transplant around Sacramento.
- Give it full sun and lean, unamended valley soil, since rich or heavily watered ground makes it flop and rot.
- On heavy Central Valley clay, sow on a slight mound or a raised spot so water drains away and the little seedlings do not sit in a puddle.
- The number-one local mistake is watering it in summer after it has died back, so once it sets seed and browns out, leave it dry.
Fall
Fall is the planting season, when the first rains wake up the valley and you sow goldfields seed. Getting seed down in October or November is the single most important step for a good spring show.
- Scatter the seed on cleared ground in October or November, timed to the first real rains around Sacramento.
- Press the seed lightly into the soil surface instead of burying it deep, since these tiny seeds need to be near the top to sprout.
- Pick a full-sun spot on lean soil, and on heavy clay sow on a slight mound so the first seedlings drain well.
- Skip fertilizer and heavy compost, because rich soil pushes floppy growth and fewer flowers.
When you clear and prep the seedbed in fall, keep the outline of the planting neat with a defined edge so the freshly sown ground reads as a planned bed rather than a bare dirt patch, which keeps a front yard looking intentional to an HOA.
Winter
Winter is the quiet growing season, when the fall-sown seed germinates and forms small green rosettes fed by the rain. In Sacramento you mostly let the winter storms and Tule fog handle the watering.
- Watch for tiny green seedlings coming up through December and January after the seed germinates on winter moisture.
- Rely on rain instead of the hose, and only water in a rare dry winter stretch if the seedlings are visibly wilting.
- Do not worry about mild frost or foggy cold, since these valley annuals grow right through Sacramento's cool wet winter.
- Weed out fast-growing grasses and weeds around the seedlings so the small goldfields are not crowded out before spring.
Spring
Spring is the big show, when California Goldfields blooms in sheets of small gold daisies across the valley. The soil is still damp from winter rain, so you mostly just enjoy it and let it finish naturally.
- Expect peak bloom March through May in the Sacramento area, right alongside poppies, lupine, and tidy tips.
- Do not add irrigation in a normal spring, since leftover winter-rain moisture in the clay is enough to carry it through flowering.
- As the weather warms in late spring, let the plants finish and start browning instead of trying to keep them green with water.
- Leave the drying seed heads in place so they can ripen and drop next year's seed for a self-sown patch.
To keep a spring bed reading as intentional to an HOA, edge the goldfields planting with a clean mowed strip or a defined border so the low golden drift looks like a chosen meadow and not a weedy lawn, which helps avoid a violation letter.
Summer
By summer California Goldfields has already finished its life and dried to seed, so the ground where it grew is meant to be dry and bare. In Sacramento's bone-dry heat you give it no water at all.
- Accept that the plants are gone by early summer, since this is a winter-spring annual that dies back once the rains stop.
- Give the spot zero summer irrigation, because water on hot valley clay in June through September only rots seed and feeds weeds.
- Once the seed has clearly dropped, you can pull or rake the crispy dead stalks if you want the area cleaner.
- If you leave a few stalks standing to reseed, know that bare, dry summer ground here is normal and healthy for this plant.
A summer-dormant native patch can look brown and dead to an HOA, so cut back or rake out the spent goldfields after the seed drops and keep the bed edges crisp, which signals the space is intentionally resting rather than neglected and helps avoid a violation letter.
Sources: Calscape, California Native Plant Society, Lasthenia californica California Goldfields, USDA PLANTS Database, Lasthenia californica, Las Pilitas Nursery, Lasthenia californica goldfields horticultural notes, UC Master Gardeners, winter care of California native wildflower seedlings, UC Davis Arboretum and Public Garden, sowing California native wildflowers in fall
Want these tasks as reminders timed to your yard? Pollinator Patch turns this guidance into a season-by-season care plan for the plants you actually grow.
In an HOA neighborhood
California Goldfields is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 2 out of 5.
Works well in: mid zone, backyard only.
- Dies back after spring, leaving bare patches in summer
- Can spread and look unintentional if not contained
- Best incorporated within designed wildflower areas rather than as standalone plants
Wildlife value
Attracts native bees and butterflies with its abundant pollen and nectar. The dense floral displays provide important early-season resources for pollinators.
Common questions
- When does California goldfields bloom?
- Lasthenia californica typically flowers from March through May, often forming dense yellow carpets in grasslands and open fields during that window.
- How much sun and water does California goldfields need?
- This forb grows best in full sun and does well with low water, making it suited to open, dry sites once it is established.
- What pollinators visit California goldfields?
- Bees and butterflies are the main visitors to the small yellow flowers of Lasthenia californica, which bloom in mass displays in spring.
- What kind of plant is California goldfields?
- It is a low, spreading annual forb rather than a shrub or tree, and it completes its life cycle within a single growing season.
- Is California Goldfields toxic to dogs?
- California Goldfields is not on the ASPCA Animal Poison Control Center toxic plant list for dogs (aspca.org).
- Is California Goldfields toxic to cats?
- California Goldfields is not on the ASPCA Animal Poison Control Center toxic plant list for cats (aspca.org).
- Is California Goldfields HOA-friendly?
- California Goldfields is generally an HOA-friendly choice in the right placement, with moderate maintenance.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
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