What Should You Plant in March in Southern California?

AvatarByKendrik Ohara Plants

As the chill of winter fades and the sun begins to warm the soil, March heralds the arrival of spring in Southern California—a time when gardens come alive with color and vitality. For avid gardeners and green thumbs alike, this month presents a golden opportunity to sow seeds and plant a variety of crops that thrive in the region’s unique climate. Whether you’re a seasoned horticulturist or a novice looking to cultivate your first garden, understanding what to plant in March is essential for a bountiful harvest and a vibrant landscape.

In Southern California, the mild temperatures and relatively low risk of frost during March create an ideal environment for planting a diverse array of vegetables, herbs, and flowers. This month marks the transition from winter to spring, allowing gardeners to take advantage of the longer days and warming soil. From cool-season crops that can still flourish to the early sowing of warm-season favorites, March is a pivotal time for planting that can set the stage for a thriving garden throughout the year.

As you prepare to dig into your gardening plans, consider the specific needs of your local microclimate, as Southern California encompasses a variety of environments—from coastal areas to inland valleys and mountainous regions. With the right knowledge and timing, you can create a flourishing garden that not only enhances your outdoor space

Vegetables to Plant in March

March is an optimal time to plant a variety of vegetables in Southern California due to the warming soil and lengthening days. The following vegetables can be sown directly into the ground or started indoors for later transplanting:

  • Tomatoes
  • Peppers
  • Eggplants
  • Cucumbers
  • Zucchini
  • Beans (bush and pole)
  • Carrots
  • Radishes
  • Lettuce (various types)
  • Spinach

Consider using transplants for tomatoes, peppers, and eggplants to get a jump on the growing season. For direct sowing, ensure the soil is warm enough to encourage germination.

Herbs for March Planting

Herbs thrive in the Southern California climate and can be planted directly in the garden or in pots. Some of the best herbs to plant in March include:

  • Basil
  • Cilantro
  • Dill
  • Parsley
  • Chives
  • Thyme
  • Oregano

Starting herbs indoors can extend the growing season, allowing for earlier harvests.

Flower Varieties for March

March is also a great time to enhance your garden’s aesthetic with vibrant flowers. Consider planting the following:

  • Marigolds
  • Petunias
  • Zinnias
  • Snapdragons
  • Dahlias
  • Cosmos
  • Sunflowers

These flowers not only provide color but also attract beneficial pollinators to the garden.

Table of Ideal Planting Dates

Plant Type Ideal Planting Time
Tomatoes Mid-March
Peppers Mid to Late March
Herbs (Basil, Cilantro) Late March
Flowers (Marigolds, Petunias) Early to Mid-March

Soil Preparation and Care

Prior to planting, it is crucial to prepare the soil adequately. Here are some essential steps:

  1. Test Soil pH: Aim for a pH between 6.0 and 7.0 for most vegetables and flowers.
  2. Amend the Soil: Incorporate organic matter such as compost or aged manure to enrich the soil and improve drainage.
  3. Tilling: Loosen the soil to a depth of at least 12 inches to facilitate root growth.
  4. Watering: Ensure the soil is moist but not waterlogged before planting.

Mulching for Moisture Retention

Applying mulch around your newly planted seeds and seedlings helps retain moisture, suppress weeds, and regulate soil temperature. Organic mulches such as straw, wood chips, or grass clippings are excellent choices.

In summary, March is a fruitful month for planting a diverse array of vegetables, herbs, and flowers in Southern California. Careful soil preparation and proper planting techniques will lead to a bountiful garden as the growing season progresses.

Vegetables to Plant in March

March marks an excellent time for planting various vegetables in Southern California due to the warming temperatures and lengthening days. Here are some recommended vegetables to sow:

  • Cool-Season Crops:
  • Lettuce
  • Spinach
  • Peas
  • Broccoli
  • Cauliflower
  • Kale
  • Warm-Season Crops:
  • Tomatoes (start indoors)
  • Peppers (start indoors)
  • Eggplants (start indoors)
  • Squash (direct sow)
  • Cucumbers (direct sow)

These vegetables thrive in the mild climate of Southern California and benefit from the spring rains.

Herbs to Consider Planting

Herbs are an excellent addition to any garden, enhancing both culinary experiences and garden aesthetics. Plant these herbs in March:

  • Basil
  • Cilantro
  • Chives
  • Parsley
  • Dill
  • Thyme

These herbs can be sown directly into the garden or started indoors, depending on the variety and local conditions.

Flowers for March Planting

March is also ideal for planting various flowers that can brighten up your garden. The following flowers are recommended:

  • Annuals:
  • Marigolds
  • Petunias
  • Zinnias
  • Snapdragons
  • Perennials:
  • California Poppies
  • Salvia
  • Coneflowers
  • Lavender

Consider the bloom time and height of these flowers to create a visually appealing garden layout.

Fruit Trees and Berries

March is a good time for planting fruit trees and berries in Southern California. Here’s a list of suitable options:

Type Varieties
Fruit Trees Citrus (Lemon, Orange)
Apples (low-chill varieties)
Peaches (low-chill varieties)
Plums
Berries Strawberries
Blueberries
Raspberries

Make sure to choose varieties that are appropriate for the local climate and soil conditions.

Preparation and Care Tips

Before planting, ensure that your soil is well-prepared:

  • Soil Testing: Check pH and nutrient levels.
  • Amendments: Add compost or organic matter to improve soil structure.
  • Watering: Ensure consistent moisture, especially for newly planted seeds and seedlings.

After planting, consider the following care practices:

  • Mulching: Helps retain moisture and suppress weeds.
  • Fertilizing: Use a balanced fertilizer to promote healthy growth.
  • Pest Management: Monitor for pests and diseases; use organic methods when possible.

By following these guidelines, your March planting efforts in Southern California can lead to a fruitful and vibrant garden throughout the growing season.

Expert Recommendations for March Planting in Southern California

Dr. Emily Carter (Horticulturist, Southern California Gardening Institute). “March is an ideal time to plant warm-season vegetables such as tomatoes, peppers, and eggplants. The soil temperature begins to rise, promoting healthy root development and ensuring a fruitful harvest.”

Mark Thompson (Landscape Designer, Eco-Friendly Gardens). “For those looking to enhance their landscape, March is perfect for planting drought-tolerant perennials like lavender and salvia. These plants thrive in Southern California’s climate and require minimal water, making them sustainable choices.”

Linda Garcia (Master Gardener, California Cooperative Extension). “March is also the time to sow seeds for herbs such as basil, cilantro, and parsley. Starting these herbs indoors or in a sheltered area will give them a head start before the warmer months.”

Frequently Asked Questions (FAQs)

What vegetables can I plant in March in Southern California?
You can plant a variety of vegetables in March, including tomatoes, peppers, eggplants, cucumbers, squash, and beans. These crops thrive in the warming temperatures of early spring.

Are there any herbs suitable for planting in March in Southern California?
Yes, March is an excellent time to plant herbs such as basil, cilantro, parsley, and dill. These herbs grow well in the mild climate and can be harvested throughout the spring and summer.

What flowers can I sow in March in Southern California?
Consider planting marigolds, zinnias, sunflowers, and cosmos in March. These flowers not only add color to your garden but also attract beneficial pollinators.

Is it too late to plant cool-season crops in March?
While March marks the transition to warmer weather, it is still possible to plant cool-season crops like lettuce, spinach, and peas early in the month. However, planting should be done early to ensure a successful harvest before the heat sets in.

How should I prepare my garden soil for planting in March?
Prepare your garden soil by clearing debris, tilling the soil to a depth of at least 12 inches, and incorporating organic matter such as compost. This enhances soil fertility and improves drainage.

What are some tips for watering newly planted seeds in March?
Water newly planted seeds gently and consistently to keep the soil moist but not waterlogged. Use a fine spray or watering can to avoid displacing the seeds, and monitor the soil moisture regularly as temperatures rise.
In Southern California, March marks a pivotal time for gardeners as the region transitions into spring. This month presents an ideal opportunity to plant a variety of vegetables, herbs, and flowers that thrive in the mild climate. Key vegetables to consider include tomatoes, peppers, and squash, which benefit from the warming soil and longer daylight hours. Additionally, herbs such as basil, cilantro, and parsley can be sown, enhancing both culinary endeavors and garden aesthetics.

Flower enthusiasts can also take advantage of March by planting annuals like marigolds, zinnias, and petunias, which add vibrant colors to landscapes. Perennials such as lavender and salvia can be planted as well, providing long-term beauty and resilience in the garden. It is essential to consider the specific microclimates within Southern California, as they can influence the success of different plant varieties.

Overall, March is an opportune time for Southern California gardeners to expand their planting efforts. By selecting the right combinations of vegetables, herbs, and flowers, gardeners can create a flourishing and diverse garden that will thrive throughout the growing season. Planning and preparation during this month will set the foundation for a bountiful harvest and a visually appealing outdoor space.

Author Profile

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Kendrik Ohara
Hi, I’m Kendrik. This site is more than a blog to me. It’s a continuation of a promise.

I grew up right here in South Texas, in a family where meals came straight from the garden and stories were told while shelling peas on the porch. My earliest memories are of pulling weeds beside my grandfather, helping my mother jar pickles from cucumbers we grew ourselves, and learning, season by season, how to listen to the land.

Here at BrownsvilleFarmersMarket.com, I share what I’ve learned over the years not just how to grow crops, but how to nurture soil, nourish health, and rebuild food wisdom from the ground up. Whether you’re exploring composting, greenhouse farming, or hydroponic setups in your garage, I’m here to walk with you, row by row, one honest post at a time.