When to Plant Mâche in Riverside, California (92521)

Location

Riverside, California

ZIP Code

92521

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Sunday, December 14, 2025

Based on last frost Sunday, January 25, 2026 · Zone 10a

Pro tip: Sow Mâche directly outdoors 6 weeks before your last frost date.

Add to Calendar (.ics)

🌿 Plant Details

Scientific Name Valerianella locusta

Days to Maturity 45 days

Mature Height 4-8"

Spread 4"

☀️ Growing Requirements

☀️

Sun

Partial Shade to Full Sun

💧

Water

Moderate (1 inch/week)

↔️

Spacing

4" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 7-14 days

Ready to Plant Mâche in Riverside?

Get your seeds now so they're ready by Sunday, December 14, 2025.

🛒 Buy on Amazon 🌿 True Leaf Market

* Affiliate links — we may earn a small commission at no extra cost to you.

🤝 Good Companions

RadishCarrotBeet

🤝

Full Companion Planting Guide for Mâche

See which plants help Mâche thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

* Affiliate links — we may earn a small commission at no extra cost to you.

🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow plants to flower and seed pods to dry on the plant.

Processing

Thresh dried plants over a bowl, separate seeds from chaff by winnowing.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

Mâche self-sows freely — allow some plants to go to seed in place for a perpetual crop.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 9 per sq ft of Mâche. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Mâche in Riverside, California? +

In Riverside (Zone 10a), direct sow Mâche outdoors around Sunday, December 14, 2025.

What is the last frost date for Riverside, California? +

The average last spring frost date for Riverside, California (ZIP 92521) is around Sunday, January 25, 2026. This is based on NOAA climate normals for USDA Zone 10a.

How long does Mâche take to grow? +

Mâche typically matures in about 45 days from direct sowing. In Riverside, that means you can expect harvest around Sunday, December 14, 2025 plus 45 days.

Should I start Mâche indoors or direct sow in California? +

Mâche does best when direct sown outdoors. In Riverside, sow directly around Sunday, December 14, 2025.

📚 More Mâche Planting Guides

🗺️

Mâche in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 10a Mâche Guide

All cities in your zone · Avg dates

→

Other Plants for Riverside

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussels Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini Sunflower Marigold Zinnia Nasturtium Cosmos Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree

Growing Mâche in Zone 10a

Mâche (Valerianella locusta) is a popular garden vegetable. In Riverside, California, which is in USDA Hardiness Zone 10a, you should direct sow seeds around Sunday, December 14, 2025.

Your average last frost date is Sunday, January 25, 2026. Mâche grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.