
Teo Spengler
Raised in Alaska, where the sun never rises in the winter and the trees are stunted by permafrost, Teo Spengler fell in love with plants when she moved to California for college. Gardening became more of a passion than a pastime, as she studied horticulture and took master gardening courses. Spengler completed an intensive sixteen-week program to qualify as a docent at the San Francisco Botanical Garden and has given public tours there for some years. She has also earned a BA in politics, an MA in English, an MFA in creative writing, and a JD from Berkeley Law School. She has written about nature, trees, plants, and gardening for 20 years for a variety of websites including Gardening Know How, Hunker, Home Guides, San Francisco Chronicle and Gardening Guides as well as publishing two novels, following a long career as an attorney and legal writer. Spengler currently splits her life between San Francisco and the French Basque Country where she has practiced her skills in both personal and public gardens for the past two decades. Her extended family includes some 30 houseplants and hundreds of outdoor plants, including 250 trees—mostly oaks, birches and beeches—that she planted on her land in France.
Latest articles by Teo Spengler
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These 5 Classic Spring Flowers Are Icons for a Reason – Plant Them Now for a Cheery Garden All Season LongThese classic spring flowers add instant brightness and beauty to the garden! Plant them now for a stunning display that lasts all season.
By Teo Spengler
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Zone 9 Planting Schedule – What to Start Each Month for the Best Vegetable Garden SuccessFollow along each month to see what seeds to start indoors and what to sow directly in the garden. This is your ultimate Zone 9 planting guide.
By Teo Spengler
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There's a Right (and Wrong) Time to Repot Houseplants – Here’s How to Know When to Do ItDon't repot your houseplants at the wrong time! It could have major negative consequences. Here's the best time to repot houseplants and the times to avoid.
By Teo Spengler
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Don’t Prune These 7 Plants in Early Spring or You’ll Lose This Year’s Flowers – Check the Right Timing for Your ZoneMany spring bloomers set buds the year before. Cut too soon and you’ll sacrifice the show – here’s how to get the timing right.
By Teo Spengler
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Is Birdseed Bad for Dogs? The 4 Surprising Bird Feed Ingredients That Can Be Harmful to PetsIf you're a bird lover with a curious pooch, you might not realize your bird food could be hiding problems. Is birdseed bad for dogs? Here's why your bird food could be hiding a toxic secret
By Teo Spengler
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Herbs That Grow in Water – 7 Fuss-Free Kitchen Staples You Can Cultivate in a GlassNot only can you grow these herbs easily from cuttings, you can grow them in a glass. Discover 7 great herbs that grow in water for an easy, soil-free kitchen garden. Just add sunlight!
By Teo Spengler
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Where to Find Free Compost: 4 Unlikely Places to Get Black Gold for Your Garden This SpringGive your garden an instant boost with a batch of black gold! Here are 4 places to get free compost this spring that will help your plants thrive all season.
By Teo Spengler
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How to Amend Clay Soil for Healthier Gardens and Happier Plants: Your Garden Will Thank YouClay soil can be hard to garden in, but you don't have to settle! Amending clay soil with organic matter can make drastic improvements. Learn how!
By Teo Spengler
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Start These 10 Vegetables in March for the Longest and Most Flavorful Season YetSpring is tapping on the door, so don’t get left behind if you want to sow these tasty staples. Here are 10 vegetables to plant in March, under glass and in the ground, to get the jump on year-long harvests
By Teo Spengler
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Soil Testing 101: What You Need To Know For a Flourishing GardenGood soil equals good plants. Regular soil testing helps you better understand your soil and how you can improve it.
By Teo Spengler
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The Best Plants for Zone 10 Gardens – Perfect Picks for Garden SuccessZone 10 is a wonderful, tropical growing zone. Here are the best plants for zone 10 gardening.
By Teo Spengler
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Plant These 5 Trees as Bare Roots Before Winter's End – and Get Better Results for Less MoneyPlanting bare root trees and shrubs is a cost-effective way to get gorgeous specimen plants, but you need to act now. Bare roots need to be planted in dormancy.
By Teo Spengler
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There’s a Small Window to Stop Crabgrass Before It Starts Growing – Here’s the Exact Moment to ActCrabgrass can quickly take over your lawn and is tough to battle once it gets going. Find out the best time to apply pre-emergent so it can't take hold.
By Teo Spengler
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Sick of Winter? Keep an Eye Out for These 6 First Flowers of Spring That Mean Winter Is Almost OverYou'll know winter is almost over when you start to see the first flowers of spring. Look for these 6 varieties that are surefire signs of the changing seasons.
By Teo Spengler
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It’s Not Your Fault Your Seedlings Are Leggy – It's All in the Light-and-Heat Balance (and It’s Easy to Fix)Leggy seedlings can make gardeners worry what they did wrong. But the answer is often out of your control. Here's how to ensure seeds get a strong start.
By Teo Spengler
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Does Foil Around Plants Really Deter Pests? The Science Behind This Gardening TrickCan this kitchen staple foil insects looking to chomp the plants your garden? Learn the ins and outs of using aluminum foil for pest prevention.
By Teo Spengler
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Is Your Houseplant Soil Repelling Water? The Simple Fix That Rehydrates RootsConsistent watering isn't enough if your soil is hydrophobic. Follow our guide to restoring and keeping moisture retention.
By Teo Spengler
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6 Native Spring Ephemerals to Add Easy Beauty While the Rest of Your Garden Is Still SleepingThese hardworking native spring ephemerals put on a show while most other plants are still sleeping underground. Add them to your garden for easy, early beauty.
By Teo Spengler

