Orange County March Planting Guide

March 1

Let’s Grow in Southern California

Our days and nights are getting warmer and spring is only 19 days away. This is the last time for succession planting of cool season crops like lettuce – plant varieties with short growing seasons (30-40 days).

With spring days away, it’s time to start hardening off your spring transplants, planning for succession sowing, and amending your garden soil. Check out our suggested flower companion planting guide this month. Heirloom Potager will be installing some new gardens for residential clients and starting some commercial design projects. Check out the Orange County CA March planting guide.

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Planning a Winter + Spring Garden with Cool + Warm Season Plants

Orange County, CA March Planting List
Orange County, CA March Herb Planting List
Orange County, CA March Flower Planting List

Here are a some great options for your March planting list:

Berries, Beans, Beets, Bok Choy*, Carrots, Cucumber (after the 15th), Kale, Leeks, Lettuces, Mustard Greens, Onions (short- and medium-day), Potatoes, Radish, Scallions, Snow Peas, Spinach*, Summer Squash, Sugar Peas, Swiss Chard*, Tomatoes (start 2nd round of seeds indoors), Winter Squash

Herbs*: Arugula,  Basil (start seeds), Chives, Cilantro, Dill, Fennel, Lavender, Mint, Nasturtium, Oregano, Parsley, Rosemary, Sage, Seasoning Celery (start seeds), Summer Savory, Sweet Marjoram, Thyme, Violas, Watercress

*Transplant Seedlings

Unique Heirloom Varieties to Plant this Season

Ronde De Nice squash

from San Diego Seed Company

Double Yield Cucumbers: rTwo small pickling cucumbers on the vine | Seeds from

Double Yield Cucumber

from Mary’s Heirloom Seeds

Pepperbox Poppy

from Renee’s Garden

Pink Banana winter squash | Seeds from Botanical Interests

Pink Banana
Winter Squash

from Botanical Interests

Practice Companion Planting for Your Fall Garden

Cactus Mix Zinnia

from San Diego Seed Company

Basket full of yellow and orange marigolds | Seeds from

Giant Bouquet Marigolds

from Renee’s Garden

Giant of California Zinnas in blossom | Seeds from

Giant of California Zinnia

from Mary’s Heirloom Seeds

Zeolights Calendula Sketch from Botanical Interests

Zeolights Calendula

from Botanical Interests

Here are a some great companion plants for your March planting list:

Alyssum*, Bachelor Buttons, Borage, Calendula, Cosmos*, Echinacea*, Marigolds*, Nasturtium, Poppy, Salvia*, Scabiosas, Zinnias

*Transplant Seedlings

Companion planting is a very old-world, organic gardening method rooted in creating a diverse ecosystem of fruits, vegetables, herbs, and flowers grown int he same space. As a result of inter-planting, you’ll create a more habitable environment for plants, improve soil health, and reduce the resources needed to grow sustainable amounts of produce.

Consider inter-planting some herbs with your fruits and vegetables this year to attract more pollinators and help keep pesky bugs at bay.

With a long and tenured history, the practice of companion planning was primarily practiced by home gardeners who weren’t driven solely by efficient outputs. However, as the impact of climate change grows and concerns over the use of pesticides for health increase, more and more gardeners (both home and commercial) are starting to implement the practice of companion planting.

Other Planting Guide Resources



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