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 several 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 more than two decades for publications including Gardening Know How, Hunker, Home Guides, the San Francisco Chronicle and Gardening Guides, as well as publishing two novels. Before focusing on gardening, Spengler had a long career as an attorney and legal writer – experience she now also brings to her role as Gardening Know How’s Gardening Lawyer.
Spengler currently splits her life between San Francisco and the French Basque Country, where she has practised 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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Bad Pruning Cuts Can Kill Actually Your Plants – Avoid These 3 Major Pruning Mistakes to Prevent ProblemsImproper pruning can seriously harm plants. Be sure to avoid these three big pruning mistakes to grow healthy, strong plants.
By Teo Spengler
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6 Unlikely Places to Find Manure for Free – Give Your Garden a Boost With a Dose of DooGive plants a big boost with a dose of animal doo! Here's where to get free manure to improve your soil without breaking the bank.
By Teo Spengler
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2 Signs of Winter Tree Damage You Won’t Notice Until Spring – and How to Fix ThemWinter weather can quietly damage trees, with the warning signs only appearing once spring growth begins. Here are two issues to watch for – and how to treat affected trees before problems worsen.
By Teo Spengler
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California Growing Zones - USDA Zone Map For CaliforniaKnowing your planting zone in California will help you have better success in the garden.
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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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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Pruning Basics: Why, When, and How to Prune for a Healthier GardenPruning isn't just about aesthetics – it’s vital for plant health. Learn how, why, and which way to prune to ensure your garden grows the best it can.
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

