The Santa Clara plum season typically runs from late June through July in California, with the peak harvest occurring in early to mid-July. This short but sweet window is when these heritage plums are at their juiciest and most flavorful, making it the best time to source, savor, or preserve them.
Background: The Santa Clara Plum’s History and Significance
The Santa Clara plum, sometimes referred to as the ‘Wickson’ or ‘Sugar’ plum, is a European-type plum variety (Prunus domestica) originally popularized in the Santa Clara Valley of California. This region, now better known as Silicon Valley, was once the “Valley of Heart’s Delight”—an agricultural hub famous for its fruit orchards, especially plums, apricots, and cherries. The Santa Clara plum was especially favored for its deep purple skin, amber flesh, and exceptional sweetness, making it ideal for both fresh eating and drying into prunes.
By the early 20th century, Santa Clara plums were a staple crop in the region, contributing to California’s reputation as a major fruit producer. Today, while large-scale commercial production has shifted, the Santa Clara plum is still grown by small orchards and home gardeners, cherished for its flavor and historical connection to the region.
When Does Santa Clara Plum Season Start and End?
Santa Clara plums are a mid-summer fruit. In most years, the first ripe plums appear in late June, with the main harvest peaking in early to mid-July. By late July, most of the fruit has been picked or has fallen, and the season winds down. This timeline can vary slightly based on local weather patterns, with a cool spring potentially delaying ripening by a week or two.
For home gardeners or small orchard owners, the fruit is often ready to pick when it yields slightly to gentle pressure and has a deep, even color. Commercial growers typically harvest a bit earlier to allow for shipping, but local farmers markets and u-pick orchards will offer plums at the height of their ripeness during this short season.
How Santa Clara Plums Are Grown and Harvested
Santa Clara plums thrive in Mediterranean climates, with cool winters and warm, dry summers. The trees require chill hours (exposure to cold temperatures) in winter to set fruit in spring. After blooming in March or April, the plums develop over several months, gradually turning from green to their signature dark purple as they mature.
Harvesting is typically done by hand to avoid bruising the delicate fruit. Growers look for plums that are fully colored and slightly soft. In backyard orchards, plums may be picked over several days as they ripen unevenly on the tree. Commercially, several passes may be made through the orchard to collect ripe fruit.
How to Choose and Store Santa Clara Plums
During the brief Santa Clara plum season, selecting the best fruit is key to enjoying their full flavor. Here’s what to look for:
- Color: Deep purple or reddish skin with a slight bloom (natural powdery coating) is ideal.
- Firmness: Plums should be slightly soft but not mushy. Overly hard plums may not ripen properly off the tree.
- Fragrance: Ripe plums give off a sweet, fruity aroma.
- Skin Quality: Avoid fruit with cracks, shriveling, or large bruises.
For maximum shelf life, store ripe plums in the refrigerator and use within a week. If you buy slightly underripe plums, leave them at room temperature to ripen for a day or two, then refrigerate. Santa Clara plums also freeze well (halved and pitted), and are excellent for making jams, preserves, or drying into prunes.
Common Problems: Pests, Diseases, and Seasonal Challenges
Growing Santa Clara plums comes with some challenges, especially for backyard growers. The main issues include:
- Brown Rot: A fungal disease that can cause fruit to rot on the tree, especially in wet springs or crowded canopies. Pruning for air circulation and removing infected fruit helps manage this problem.
- Plum Curculio: A weevil that lays eggs in developing fruit, causing it to drop prematurely. Regular orchard sanitation and, in some cases, targeted insecticides can help.
- Birds and Squirrels: These animals often target ripe plums. Netting or scare tactics can reduce losses.
Weather can also impact the season. A late frost may damage blossoms, reducing yields, while unseasonable rains close to harvest can cause fruit splitting. Despite these risks, the Santa Clara plum remains a favorite for its reliability and flavor.
Santa Clara Plums vs. Other Plums
Santa Clara plums differ from other common varieties in several ways:
- Flavor: They are notably sweeter and less tart than Japanese-type plums like ‘Santa Rosa’.
- Texture: The flesh is firm, making them good for both eating fresh and drying.
- Size: Santa Clara plums are typically smaller than supermarket plums but pack more flavor.
- Season: Their season is shorter, often just a few weeks, compared to some other varieties that ripen over a longer window.
This makes Santa Clara plums especially prized by fruit enthusiasts and bakers who seek out traditional, high-flavor varieties.
Uses and Preservation: Making the Most of the Season
Because the Santa Clara plum season is brief, many fans look for ways to extend their enjoyment. Here are some classic uses:
- Eating Fresh: Enjoyed out of hand for their sweetness and juiciness.
- Drying: Traditionally dried into prunes, which can be stored for months.
- Preserves and Jams: Santa Clara plums make excellent jams, jellies, and fruit butters due to their high sugar content.
- Baking: Used in tarts, cakes, and classic desserts like plum kuchen.
- Freezing: Halved and pitted plums freeze well for later use in smoothies or baking.
To dry plums at home, halve and pit the fruit, then dry in a dehydrator or low oven until leathery and pliable. For canning, always follow USDA guidelines for safe preservation.
Where to Find Santa Clara Plums
Because Santa Clara plums are not widely grown commercially anymore, your best bets for finding them are:
- Local farmers markets in the San Francisco Bay Area and Central California (late June to July).
- Specialty fruit stands or orchards offering u-pick or pre-picked fruit.
- Backyard or community gardeners who may share or sell surplus fruit during the season.
Supermarkets rarely carry Santa Clara plums, as most mass-market plums are newer Japanese hybrids bred for shipping durability over flavor. If you live outside California, check with local heirloom fruit growers or specialty nurseries.
Frequently Asked Questions
- When are Santa Clara plums ripe for picking?
Santa Clara plums are typically ripe from late June through July in California, with the peak in early to mid-July. Look for deep color and slight softness to the touch. - Can I grow Santa Clara plums outside California?
Yes, Santa Clara plum trees can be grown in other regions with a mild Mediterranean climate and sufficient winter chill. They may not thrive in very hot, humid, or cold climates. - How do Santa Clara plums differ from Santa Rosa plums?
Santa Clara plums are European-type, smaller, and sweeter, with firmer flesh. Santa Rosa plums are Japanese-type, larger, juicier, and more tart. - Are Santa Clara plums good for making prunes?
Absolutely. Their high sugar content and firm texture make them one of the best varieties for drying into prunes. - How long do fresh Santa Clara plums last after picking?
Ripe plums last about a week in the refrigerator. For longer storage, consider freezing or drying. - Why is the Santa Clara plum hard to find in stores?
Santa Clara plums are grown mostly by small orchards and backyard gardeners, with limited commercial production. Most supermarket plums are other varieties bred for shipping.
Conclusion: Celebrating a Heritage Fruit
The Santa Clara plum season is a fleeting highlight of summer in California, celebrated by fruit lovers and bakers alike. With its deep flavor, historical roots, and versatility, the Santa Clara plum remains a cherished heirloom. Whether you find them at a farmers market, grow your own, or receive a basket from a neighbor, savoring Santa Clara plums during their short season is a delicious way to connect with California’s agricultural past.