How to grow a healthy garden

It’s easy to get overwhelmed by the sheer volume of gardening advice in books and websites. So I thought I’d simplify things by sharing my top 10 tips for keeping a garden healthy. 

Start with your soil. Healthy soil grows healthy plants. So get a soil test to know what you have and need.  

Add compost or other organic matter regularly to enliven the soil and keep the soil community happy. This intricate web of beneficial microbes, fungi, bacteria, worms, and more is crucial to healthy plants. 

Well-adapted native plants such as this white penstemon naturally resist pests and disease. Photo: Kathy Vesely

Minimize soil disturbance. Every time you turn the soil, you bring up weed seeds and wreak havoc on the soil community. So dig and till minimally.

Keep the soil covered with plants, an organic mulch, or cover crops. Bare soil invites weeds, encourages soil-borne disease, and promotes erosion. 

Put the right plant in the right place. Choose plants that suit the site whether it’s sunny or shady, wet or dry. This matchmaking helps plants not only survive but thrive.

Use native plants. These tough, well-adapted plants need less water and fertilizer. Since they co-evolved with native wildlife, they support pollinators and other native species best. 

Encourage beneficial insects. These are the good bugs that help control bad bugs. Nine out of ten insects are beneficial, naturally controlling the few true pests. Put them to work for you. 

How? Reduce or eliminate chemical pesticides which kill both good and bad bugs. Use organic products instead and try other controls like hand-picking or floating row covers.

Further, encourage beneficial insects by planting a wide variety of plants to provide food and shelter. Add a rock to a birdbath so insects can sip. 

Wait to cut back perennials and grasses until spring to give beneficial insects a safe place to overwinter. Many tuck into hollow stems or leaf litter.

Check your plants often. When you’re strolling, be patrolling. Look for spots, yellowing, or other changes that might be clues to a problem. Early detection makes fixes easier.

If you live in Washington County, Maryland, e-mail or call me if you need help identifying an insect or disease. Just send me a photo or bring me a sample. If you live in another area of Maryland, contact your county or city Extension office, or send your questions to Ask Extension.

Many problems are preventable. Honest. About 80% have cultural or environmental causes and aren’t due to pests or diseases. So there’s much we can do to prevent problems.

Water wisely. Water in the morning and avoid overhead watering. Leaves that are wet overnight tend to have fungal problems.

Removed diseased plants. Add compost which naturally suppresses some diseases. Space plants so air circulates. Cover bare soil so rain doesn’t splash fungal spores up onto plants.

At the end of the growing season, thoroughly clean up vegetable plant debris which can harbor harmful overwintering insects and disease.

There you have it, my top 10 tips for a healthy garden. When you work with nature, not against it, you naturally limit pests and diseases, grow more resilient plants, and build a healthier garden and community.

That’s a very good feeling indeed.

By Annette Cormany, Principal Agent Associate and Master Gardener Coordinator, Washington County, University of Maryland Extension. This article was previously published by Herald-Mail Media. Read more by Annette.

This article was previously published by Herald-Mail Media.

Plant shopping soon? Avoid buying invasive plants

It’s a sunny day in late February and that means I’m looking at seed catalogs and dreaming of new plants! Have you been plant shopping yet this year? Adding new plants and seeds to your garden creates new scents, textures, colors, and shapes and is the easiest way to increase biodiversity in your landscape!  

As you begin revitalizing your garden space this spring, I want to bring some attention to invasive plants, a category of plants that should strike fear and dread in your heart! Okay, maybe that’s a bit dramatic, but truly this is a topic that everyone needs to learn more about. 

Q. What is an invasive plant?

A. An invasive plant is a non-native, “alien” species that was introduced intentionally or by accident into the landscape and causes ecological and/or economic harm. These plants tend to be free from predators, parasites, and diseases that could help keep them in check. These plants reproduce rapidly with multiple methods (i.e. seeds, stolons, root cuttings, runners, etc.) and spread aggressively. They tend to be deer resistant or deer tolerant, a big reason why they are purchased and planted in landscapes. Below is a photo of purple loosestrife. Notice how it is creating a monoculture, a visual key that might mean the plant is “invasive.”

purple loosestrife flowers crowding a field
Invasive purple loosestrife (Lythrum salicaria).
Photo: Richard Gardner, Bugwood.org

Did you know that some invasives are still for sale at nurseries, greenhouses, and in mail-order catalogs?   

It’s true. Many of the plants on “watch lists” are still readily available to purchase. Japanese barberry is an invasive plant that is a very popular landscape plant still being widely planted today; however, research shows that black legged ticks have been found in areas with invasive barberry thickets because these non-native, invasive forest shrub thickets create ideal microclimates.   

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Beyond broccoli: A brassica series

Broccoli photo from University of Maryland Extension

Welcome to “Beyond Broccoli”! In my next several monthly posts, I’m taking a deep dive into the genus Brassica and its place in our vegetable gardens. In this first installment, I’ll be exploring the classification of these plants and where they fit into the plant world.

Brassica is (logically enough) part of the family Brassicaceae, which is pretty huge, containing approximately 372 genera and 4060 species. Most of these are not common garden plants, though plenty are; examples include sweet alyssum (Lobularia maritima), honesty (Lunaria annua), and stock or gillyflower (Matthiola incana). Other notable plants in this family include Arabidopsis thaliana or thale cress, used as a model organism in many scientific studies, and Allilaria petiolata or garlic mustard, a persistent weed many of us fight back for years. One way to get rid of your garlic mustard is to eat it—it’s strong-tasting but great to mix with other greens. Many Brassicaceae plants are edible, though of course not all; always investigate before ingesting.

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Pruning 101: The basics for success

This is a great time of year to prune most deciduous trees and shrubs so let’s cover some tips and techniques.

What is pruning? Pure and simple, it’s removing the undesirable parts of plants.  

Good pruning improves plant health. It gets rid of dead and diseased parts and improves air circulation, shape, and appearance. It can also restrict growth, stimulate flowering and fruiting, and rejuvenate older plants.  

February to early March is the ideal time to prune many trees and shrubs because they are dormant. The cuts you make will add vigor without trauma. 

You need only a few tools. Start with hand pruners to clip small twigs and branches. Add a pair of loppers to cut larger branches. For tight spots, it’s hard to beat a folding pruning saw.

No matter what tools you choose, keep them sharp and clean.

Leave to the pros – licensed tree experts or certified arborists – the pruning of large trees or work that involves climbing or cutting near power lines.   

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January is for garden planning

I spent the early days of January 2023 thinking about the vegetable garden I won’t be planting until March. I’ve ordered my seeds, and I’ve gone so far as considering drawing a map of what goes where. (I may not get beyond considering, though it would be smart if I did—see below—but planning in two dimensions is always hard for me, and I’m pretty good at knowing how much I can grow in my 400 square feet, just not necessarily where exactly it’s going to go.) There is absolutely no need to start all this quite so early, but I like knowing that the seeds I want won’t run out before I get to them, and I had the time and enthusiasm, so there we are.

Since I don’t have room to grow everything I might want to, I have to make some choices. When I was a newbie gardener, I always bought too many seeds, and… okay, I still buy too many seeds, but at least I have a method now! So I thought I’d share it in case it’s of help to anyone.

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Winter Garden Chores & Holiday Tree Tips: The Garden Thyme Podcast

Listen to the podcast

It is almost 2023, but you can still do some chores in your garden this year. In this episode of The Garden Thyme Podcast, we talk about the winter garden chores Rachel has been doing, and Mikaela and Emily have been putting off. We also talk holiday plant care (16:00), including caring for living trees (19:00) and fresh-cut trees (28:10).  

Link to our survey: go.umd.edu/gardenthyme

The effect of Christmas lights on trees: NPR Science Friday. 

Thank you all for listening. See you next year! 

– Mikaela, Rachel & Emily 

If you have any garden-related questions, please email us at UMEGardenPodcast@gmail.com or look us up on Facebook. For more information about topics covered in the podcast, please check out the UME Home and Garden Information Center.

The Garden Thyme Podcast is brought to you by the University of Maryland Extension. Hosts are Mikaela Boley- Senior Agent Associate (Talbot County) for Horticulture, Rachel Rhodes- Agent Associate for Horticulture (Queen Anne’s County), and Emily Zobel-Senior Agent Associate for Agriculture (Dorchester County).

Theme Song: By Jason Inc

Holiday gift ideas for gardeners

branch of a fir tree with holiday lights in the background

Can you hear them? Tiny little elves are softly singing carols. The holidays must be around the corner.

If you’re scratching your head for gift ideas for the gardeners in your life, the Master Gardeners and I can help. Here are a few suggestions to make smiles wider and green thumbs greener.

Tools are cool. Yes, we say we really don’t need yet another tool. We lie. Our eyes light up at the flash of steel and the smoothness of a wooden handle. 

A Hori Hori soil knife – a multipurpose tool with a serrated edge and slight curve that digs, plants, cuts, weeds, and more – is a perennial favorite.

hori hori sitting on garden soil next to planted garlic
Used here to plant garlic, a Hori Hori knife also digs, cuts, weeds, and more.

Folding saws are a marvel for pruning in tight spots. Garden kneelers let you work sitting or kneeling with grips to give you a boost in getting up. If you’re over 50, you get it.

We gardeners are always looking for our next favorite garden glove. I have two: a waterproof glove and a sturdy but breathable pair with cushioned fingertips and palms.  

red garden gloves
A good pair of gloves is an indispensable gardening tool and a fine holiday gift idea.  

Gardeners love books. Doug Tallamy’s Nature’s Best Hope and Bringing Nature Home top many Master Gardeners’ wish lists as do other conservation-minded books.

Magazine subscriptions make fine gifts, too. How about Horticulture, Fine Gardening or Birds & Blooms? 

I treasure handmade gifts, both to give and receive. Gifts from the garden – such as pesto, jam, and herbal liqueurs – are especially welcome.  

If you’re crafty, sew a garden apron, paint garden markers or make a hypertufa pot. If bigger is better, make a birdhouse, potting bench, or trellis. 

Good things also come in small packages. Seeds make great gifts.

Botanical Interests offers blends for butterflies, pollinators, and more in beautiful, informative seed packets. The Hudson Valley Seed Company sells heirloom seeds in incredibly artful packets. 

Bundle small gifts into a pot or gift basket. One Master Gardener fondly remembers an upcycled vintage bushel basket filled with bulbs, a bulb planter, and handmade plant markers.

Still stumped? How about a gardening calendar for year-round enjoyment or a garden-themed jigsaw puzzle that keeps twitchy gardening fingers busy in the winter months? 

You can’t go wrong with a gift card to a favorite garden center or online store. I used to disdain gift cards, but now embrace them because the recipient can get just what they want and need.

Always welcome is the gift of time. Why not give a busy gardener a coupon good for a few hours of planting, weeding, watering, or tending? For many of us that is the best gift of all.

Among my many gifts are my Master Gardeners. Thanks to Master Gardeners Lori, Ann, Will, Chanelle, Marcia, Dusty, Michelle, Susan, Catherine, Karen, Judy, and Sharon for their suggestions for this column. 

We hope we’ve given you some ideas to jump-start your holiday gift-giving. 

By Annette Cormany, Principal Agent Associate and Master Gardener Coordinator, Washington County, University of Maryland Extension. This article was previously published by Herald-Mail Media. Read more by Annette.