How to: Prepare Your Bay Area Garden for Autumn
The autumnal equinox is Sunday, September 22! Fall brings a refreshing change to the Bay Area; with the heat abating, we’re beginning to wake to wet and misty mornings. The summer native flowers are fading, leaving brown branches full of seeds, rich in nutrients for native birds and wildlife.
Preparing your garden for this transitional season is crucial to ensure it thrives in the cooler, wetter months ahead. With the Bay Area's unique microclimates, from coastal fog to inland warmth, gardeners face a variety of conditions that make fall prep an essential part of the yearly gardening cycle. Whether you're looking to refresh your flower beds, plant cool-weather crops, or simply tidy up, now is the perfect time to get your garden ready for the season's arrival. Read on to learn how to make the most of your fall garden in the Bay Area, including helpful links to outside sources dealing specifically with native plant care.
Use “the 4 D’s” to deadhead and prune back perennials.
The California Native Plant Society recommends using this handy pruning mnemonic.
Remove the four “D’s”:
(1) Dead branches and leaves,
(2) Damaged or (3) Diseased growth, and
(4) “Deranged” branches (those growing awry).
Perennials to prune in fall include: Bellflower, Daylilies, Salvia, Coneflowers, Catmint, Hosta, Iris, Peonies, and Hydrangeas.
Pruning Hydrangea Macrophylla in late summer/early fall encourages a final burst of growth before the colder and wetter months. For more pruning tips, including plant-specific advice for California natives, visit the California Native Plant Society’s article, “Pruning Tips and Techniques.”
Clean and organize your tools.
September is a great time to clean, organize, and care for your tools after a summer of heavy use.
Disinfect, air dry, and oil shears and spades.
Wash totes and gloves.
Polish watering cans and tool handles.
Pro tip: always use earth-friendly cleansers and oils!
Organize tools with a pegboard and label system.
For more detailed information on cleaning your tools, including step-by-step instruction, visit The Spruce’s article, “How to Clean Garden Tools.”
There are many interesting garden tools that can help make your gardening more efficient, such as the hori hori knife, a Japanese multi-use garden tool. Read more about this and other tools in The Pioneer Woman’s article, “13 Best Gardening Tools That Everyone Should Own.”
Create an eco-haven for wildlife.
Heavy garden clean-up is best done in spring. Save time and help wildlife by leaving your autumn garden in a more natural state. Consider eco-friendly, minimalistic grooming:
Leave dried seeds on native plants for the birds to eat.
Let piles of dried matter accumulate for animals to shelter under.
Reuse any garden refuse.
To learn more about eco-friendly fall gardening, read “Why You Shouldn’t Clean Up the Fall Garden” from monarchgard.com.
Reuse garden waste for healthy soil.
This autumn, instead of throwing away clippings, put your garden waste to work!
Sprinkle pruning clippings around the base of your plants to make a free, nutrient-rich mulch.
Remove any spent vegetable plants and compost them either in a thin layer directly on top of existing soil or in a dedicated compost pile.
The latest research suggests that tilling is counterproductive to healthy soil; instead, amend soil with organics. Layer about 2 inches atop existing soil.
Home Composting: CalRecycles offers this amazing webpage, including a downloadable booklet, all about composting. You might also like to watch a video about the perfect composting recipe from SanJoseRecycles.org.
Get ready to plant California natives.
California native planting season begins in October. In September, order your favorites and plan your garden!
Here are some tips for planting season:
Remember to keep the final size of the plant in mind - some natives can grow to cover 15 ft or more!
Plant in LATE fall, and don’t plant wet! If the rains have started, wait for a clear day when the soil isn’t soaked.
Dig big, plant high! Dig a hole twice the size of the root ball, and install the plant with the top of the root ball about 1/2” above the surrounding soil.
Dig a trench around the plant, add 1-2” of mulch, and water in to establish. Don’t overwater - most natives are drought-tolerant.
Visit cnps.org for more info about native plants. For detailed instructions about native planting in our area, including nine native planting tips, read Planting California Natives: The Time is Now [Fall/Winter] by Linda Carloni.
Enjoy your fall garden!
More Helpful Links:
October Planting Tips from UC Master Gardeners
What to Do in September/October/November from Master Gardeners of San Mateo & San Francisco Counties
The Native Plant Garden in Fall by Pacific Horticulture - a beautiful blog post including lovely photos of a Sacramento Valley native garden.
Pictures of flowers of a native plant garden in November - a simple and beautiful collection of late-autumn flowering plants in a Santa Margarita garden.
Bay Area Fall Landscaping Tips from BeeGreen Recycling