Growing Strawberries in Northern California

Strawberries come in three patterns, and the choice matters more than the brand name on the tag.

June-bearing types produce one large flush in late spring (here, often May into June). They make the biggest berries and the best jam harvest, but for a short window. Good performers for inland California include Chandler, Camarosa, and Seascape's June-bearing cousins.

Day-neutral types — Albion, Seascape, San Andreas, Monterey — flower and fruit on and off through the season as long as temperatures are moderate. They are the better choice for most Northern California families because they spread the harvest out and shrug off our long season, though they slow down in extreme heat.

Everbearing types fruit in spring and again in fall and sit in between. For a steady supply of fresh berries to eat, plant day-neutrals. For a concentrated harvest to preserve, plant June-bearers. Many gardeners grow a few of each.

Strawberries want full sun, rich soil, and sharp drainage. They hate sitting in wet feet, which is exactly what causes crown and root rot.

Plant in a raised bed, a wide mound, or containers. Work in two to three inches of compost. Strawberries prefer slightly acidic soil, around pH 5.5 to 6.5 — most valley soils are fine, but heavy clay should be lightened with compost and raised up so water drains away from the crown.

In the hottest inland gardens, a spot that gets strong morning sun and a little afternoon shade in midsummer is ideal. Full all-day exposure works too, but you will lean harder on mulch and water.

This is the single most important step, and the one most new growers get wrong.

The crown is the thick point where the leaves meet the roots. Set each plant so the crown sits right at the soil surface — roots fully buried and fanned out below, crown not covered. Plant too deep and the crown rots. Plant too shallow with exposed roots and the plant dries out and dies.

Soak bare-root crowns in water for 20 to 30 minutes before planting. Trim any extra-long roots to a few inches so they spread instead of bending upward. Space plants 12 to 18 inches apart, in rows about 18 inches apart, to leave room for runners and airflow.

Straw mulch is classic for a reason. A clean layer of straw around the plants keeps developing berries off the soil, conserves moisture, suppresses weeds, and — critically for us — keeps the root zone cooler through valley heat.

Tuck mulch under the leaves and around the crowns without burying them. Refresh it as it breaks down. In the worst of summer, that buffer between soil and sun is doing real work.

Use /learn/growing-guides/companion-planting to plan good neighbors — borage and bush beans get along with strawberries, while you should keep them away from the cabbage family.

Strawberries have shallow roots and thin skins. In Northern California heat, inconsistent water is the fastest way to small, sour, or sunburned fruit.

Aim for about one to two inches of water per week during cool weather, and more during heat waves — beds can need water daily when temperatures climb past 95 degrees. Drip irrigation or a soaker hose is far better than overhead watering, which wets the fruit and leaves and invites rot and disease.

Keep the soil evenly moist, never swampy and never bone dry. Consistency matters more than volume.

Feed strawberries with a balanced or slightly potassium-forward fertilizer as growth starts in spring, and again lightly through the season for day-neutrals. Do not overdo nitrogen — you will get lush leaves and few berries.

On June-bearing plants in their first year, pinch off the early flowers for the first several weeks. It feels wrong, but it pushes the plant to build roots and runners and pays you back with a much stronger harvest. Day-neutrals can be allowed to fruit their first season, though pinching the very first flush still helps establishment.

Runners are the long stems that root new daughter plants. For bigger berries, trim most runners off so the plant feeds fruit instead of babies. To expand your bed for free, let a few runners root into pots or open soil, then cut them loose once established.

Two threats peak in a Sacramento Valley summer: heat and birds.

When a serious heat wave is coming — sustained days over 95 to 100 degrees — drape 30 to 40 percent shade cloth over the bed during the hottest afternoon hours. It prevents flower drop and sunscald on the fruit. Combined with mulch and steady water, shade cloth is what keeps day-neutrals producing instead of stalling.

Birds will find ripe berries before you do. Bird netting over hoops is the reliable fix. Watch for slugs and snails in the mulch, and for spider mites, which thrive in hot, dusty, dry conditions — a sign you may need more consistent water and humidity at the leaf.

After a June-bearing harvest finishes, renovate the bed: mow or shear the old leaves to a few inches above the crowns (never cut into the crown), thin crowded plants, weed, top-dress with compost, and water it back into growth. This resets the planting for next year.

Day-neutral beds do not get the same hard renovation, but they benefit from grooming — removing spent leaves and tired plants — and from a compost top-dress.

Strawberry plants lose vigor after about three years. Plan to start new plants from runners or fresh crowns on a rolling basis so part of your bed is always young and productive. Letting a few runners root each year makes this nearly free.