Diana C. Kirby

About Diana C. Kirby

Diana Kirby is a lifelong gardener and longtime Austinite, who loves the Central Texas climate for the almost year-round opportunities it offers for active gardening and seasonal splendor. Known as an impassioned and successful gardener, Diana began by helping friends design and implement their landscapes. Soon, she was contracted as a professional designer by a popular local landscaping installation firm, where she designed landscapes for residential and commercial clients for several years. In 2007, her new passion blossomed with the launch of her own firm, Diana’s Designs. ... Diana is a member of the Association of Professional Landscape Designers, the Garden Writers Association of America, and she writes a monthly gardening column for the Austin American-Statesman. Diana teaches the Landscape Design classes for several county Texas Agrilife Extension Service Master Gardener certification programs and speaks about gardening and design for garden centers and other groups. Learn more about presentation topics, availability and speaking fees.

Simple steps to delicious container veggies at home

We are all craving back-to-basics outdoor time right now.  Early concerns about food lit a fire under many of us to grow our own fruits and veggies at home.  But what if you’ve never grown food before?

Many would-be vegetable gardeners are thwarted by a lack of experience or space, impenetrable rocky soil or clay, or a shortage of sunshine.  With limited space on a balcony or patio, too much shade or landscape conditions that aren’t conducive to vegetable gardening, what’s a wannabe green thumb to do?

The burgeoning gardening movement and the increasing national interest in growing vegetables at home has fueled the creation of many alternatives to a patch of rich soil in the ground.

Alternative growing containers are the latest trend, making vegetable gardening simpler than ever.  To go along with the increasing desire for small space alternatives, there are also more container-sized vegetable varieties now than ever before.

Most vegetables can be grown in a whole host of containers.  From boring plastic pots to specially designed grow bags, it’s never been easier to get started.  There are many other container options for inexpensive and moveable mini-gardens, too.  Consider large 5-gallon plastic buckets, leftover from house projects.  Other options include wooden barrels, galvanized tubs, even bushel baskets.   Just make sure the container has adequate drainage by poking holes in the bottom.  And, if you’d rather not look at a white plastic pickle bucket housing your tomatoes, you can spray paint your container to match any garden decor.  Make sure the container is safe, and not treated in any way with toxic materials.

Don’t forget about vertical spaces. Hanging baskets can be used for lightweight greens and herbs and some fruits or vegetables will even grow in upside-down hanging planters.  Train your vining vegetables up on poles, supports or trellises as much as possible, using the vertical space in your garden as well as the ground.  Large plants like tomatoes will also need tomato cages in the pots to give them the support they need.

Use the right size planter.  Smaller containers work for herbs, but for veggies, make sure your pot is big enough and has drainage holes in the bottom.  One of the most important things you can do to ensure success is to use a big enough container—the bigger, the better. For one indeterminate tomato plant, for example, you need a container that is at least 1 square foot, but 2 square feet is better. Five-gallon buckets (with holes drilled) are the perfect size for one plant.

Be sure to use a lightweight potting soil.  Choose a mix designed specifically for pots that will help it drain properly. Do not use topsoil or garden soil.

Keep a close eye on the moisture needs of the plant – remember, containers dry out faster than soil in the ground.  Be sure to water regularly to keep plants happy and healthy.  Keeping your containers near a water source will make regular watering easier.

Check out your sunlight.  Most veggies need between 6-8 hours of sunlight.  If you have lots of shade, containers are great because you can move them around the maximize sun exposure.

Make sure you give your plant the right nutrients—nitrogen, phosphorus, and potassium—all essential for container growing. Some potting soils come with fertilizing nutrients in them. If your bag doesn’t, buy all-purpose slow-release fertilizer or a tomato/veggie-specific fertilizer and follow the directions on the bag.

Happy Gardening.

Easy beautiful flower bouquets from your own garden

If Covid-19 is keeping you at home, why not bring your garden in with you? Even if you only have a small yard, chances are you have everything you need to bring a beautiful, garden-fresh bouquet into your home.

You may think you need daisies or roses or other traditional cutting flowers to create a floral arrangement.  You don’t.  Have you thought about adding in lantana or salvia or branches from your shrubs?  Landscape shrubs with beautiful stems – whether they bloom or not – can stand alone or provide structure, color, and texture to a vase full of flowers.

I used to have a very small bed that I called the cutting garden.  In the spring it was full of bluebonnets, larkspur, gladiolas, clematis and roses.  Later, it was overflowing with orange cosmos, lion’s tail and zinnias.  But you don’t have to have a special cutting garden to cut flowers to bring inside.

When I wander outside to cut flowers for a vase, I walk through the entire garden. Nothing is off limits as I add pretty blooms to my bucket.  One of my favorite additions, the perennial, Esperanza, also commonly known as Yellow Bells, (Tecoma stans) adds a hot pop of color with an arching form and soft foliage in any kind of vase.  Since they bloom from late spring into fall, I always have something yellow with which to make an arrangement.  I also have several colors of lantana throughout the garden, so I never have a shortage of filler.

Don’t forget about your vegetable or herb garden plants, either.  Rosemary, parsley, sage and basil are regular additions to my vases.  They add beautiful foliage and make the house smell wonderful.  You might even forego a fruit or vegetable in favor of the beautiful bloom it produces.  I always let my artichokes bloom because I’m smitten with the flowers.  I just buy my artichokes at the grocery store.  Consider using the lovely blooms of okra or onions the next time you create a bouquet.

Landscape plants for floral arrangements

Indigo spires salvia
Yellow bells
Lion’s Tail
Mexican oregano
Salvia Greggii
Verbena
Pride of Barbados
Crape Myrtle
Lantana
Rosemary
Loropetalum
Japanese Quince
Abelia
Bi-color iris
Native grasses
Pentas
Ferns
Artemsia
Oleander

Almost anything in your garden can be worked into a bouquet.  Now that you’ve identified some of your own pretty garden flowers that you’d like to put into a vase, how do you start?

First, cut your flowers and foliage early or late in the day, when it’s cooler and their stems are firm and full of water.  In the heat of the day, flowers become dehydrated.  Take a bucket of water out into the garden with you, so you can drop them straight into the water after you’ve cut them.

Plants with multiple buds or bloom spikes, like Indigo or mystic spires salvias or larkspur, should have at least one bud open when you cut to ensure that the remainder will open once in your vase.  Flowers that grow on individual stems should be cut when fully open.

Use clean, sharp tools like a small kitchen knife or floral snips to cut delicate stems and pruners to cut woodier stalks. Don’t use scissors – they will crush the stem and prevent proper water intake.  Cut stems as long as possible to give yourself more options when putting together the arrangement.  You can always make them shorter later.  Make cuts at a 45-degree angle to allow as much space on the stem to drink in the water.  For woody stems, you can also split the bottom inch of the stem with a knife to increase their ability to take in more water.

Removing most of the leaves from the stems, particularly below the water level, encourages water absorption and keeps the vase from being too crowded.  It also helps retard bacterial growth that shortens the life of the flowers and makes the water smelly and cloudy.

Now it’s time to decide how you want to arrange the flowers and in which container they’ll look best.

Any water-tight vessel will work.  Small cream pitchers or mason jars work well with small, posy-style bouquets.  Tall, columnar vases look best with a few long stems or flowers or branches.  Galvanized buckets or ornamental watering cans pair nicely with a wild arrangement of more rustic flowers.  A vase that flares out at the top will allow arching stems to droop gracefully from the bouquet.  I sometimes tie raffia or other ribbon around the vase, and I’ve also added sliced lemons to line the inside of a glass vase.

Just as with planters, for most floral arrangements, you’ll want to include thrillers, spillers and fillers.  The height of your flowers should equal about one and a half times the height of the container.  Start by adding some stems of your filler – these could be foliage or more delicate or smaller-sized blooms.  Then add your focal point.  This could be a single bloom or 3 to 5 blooms, depending on the size of your vase.  (Using odd numbers of blooms will be most visually appealing.) These might be the largest or most unique blooms in your arrangement, and should be taller than the filler.  Then add your accents – smaller than your showstopper, in complementary colors and textures.  You can choose to go with a monochromatic collection of blooms, or vivid, contrasting colors.

I sometimes find it’s easier for me to “build” my arrangement in my hand, starting with the focal point and turning the collection with each addition and lowering the height of the stems as I work my way around.  There’s no right or wrong way; these are just tips to help you create a beautiful balanced arrangement.  You can also make dramatic, exotic asymmetrical bouquets, tightly combined cube or fishbowl vases, or floral foam arrangements for shorter centerpieces.

The best way to ensure you get the longest life out of your arrangement is to add a ready-made preservative like Floral Life.  These contain the right amounts of nutrition, cleanser and citric acid.  Change the water daily and remove spent blooms.  You can also cut the stems again to help lengthen bloom life.

Design definition and texture in new landscape garden bed

I’m on a roll.  Gardening is good for the soul, and for the exercise and creative outlet it provides during this stressful time.  My free time is often spent surfing the web for the perfect plant since I’ve been avoiding nurseries.  As fast as they arrive in the mail, I’m expanding garden beds to contain them!

Since the move last summer, I’ve been lonely without my recommended daily allowance of blooms.

There were a handful of hastily pre-sale planted impatiens in the front of the house, but nary a flower anywhere else.  I couldn’t even make a tiny posey for my desk.

It was sad.

Having filled the new beds that I created along the dry creek, I decided I needed some more plants.

I turned to my winter sources, searching for my favorite plants online.  I’ve slowly been planting in front of the creek above of the sidewalk.  I’ve been digging out multiple 6-inch circles to plant individual plants, leaving the grass right beyond that!

Having filled the new beds that I created along the dry creek, I decided I needed some more plants.

I turned to my winter sources, searching for my favorite plants online.  I’ve slowly been planting in front of the creek above of the sidewalk.  I’ve been digging out multiple 6-inch circles to plant individual plants, leaving the grass right beyond that!

Last week, I finally got help to get the whole bed dug out with room for a lot more plants!

Here’s the before photo. When we moved in, there was little to no grass because of dense shade of over gown trees.

We pruned the trees heavily last summer and watered the grass, but this area is still a little shady, so it would be perfect for the part-shade and part-sun plants I love.

In the new bed I added salvia, rose campion, datura, daisies, lantana, gomphrena, iochroma, and eryngium. When the universe opens back up again, I’ll be in search of a very large turquoise pot to put on top of the large rocks at the top of the hill before the oak tree.

I can’t wait until all of these lovelies are in full bloom.  I’m hoping it will be a bouquet of color, texture and form every single day!

Mix colorful garden edibles into your landscape

Want to expand the plant palette in your landscape but having trouble finding just the right plants?  Consider mixing edibles into your ornamental garden beds.  Many families are working on growing Victory gardens during this Covid-19 crisis.  Even if you don’t have a designated veggie garden, you can still start growing them.

For those with smaller gardens who want to grow their own food, working vegetables into the landscape makes the best use of precious space.  No longer relegated to huddle in a hidden corner of the yard, edibles can stake their claim throughout the garden and open up a whole new group of plants to help you spice up your ornamental landscape.

Edibles aren’t just for eating anymore.  They also add color, texture and scent to the garden. Spring is the perfect time to evaluate your needs and incorporate veggies and herbs into the landscape.  Unsightly holes left by annuals or perennials that didn’t survive the winter can be welcoming spaces for edibles if the conditions are right.  Just make sure the light and water needs match those of your existing perennials and evergreen plants.  Most vegetables want six hours of sun and need consistent moisture.  Many herbs are drought-tolerant and will thrive with less water.

One of my favorite plant color combinations is the chartreuse, burgundy and ice blue colors often used in the Pacific Northwest.  With far fewer burgundy choices in our climate, I was stumped trying to incorporate those colors into my Austin landscape.  I had loropetalum, non-invasive nandina, and black scallop ajuga in my garden, but wanted more burgundy options. So, I turned to the vegetable and herb section at my local independent nursery.  Purple ruffles basil, red acre cabbage and red Russian kale proved excellent choices to tuck in between my contrasting perennials.

Many edibles also provide interesting contrast by adding unique texture and form into the mix.  Artichokes, with their large, spiky leaves and brilliant lavender thistle-like blooms make stunning sculptural focal points.  Thick-veined and curly greens stand out when planted next to smaller, softer border plants like zexmenia, purple skullcap or damianita. Feathery dill plants give the garden a wispy element to include next to woody perennials.

Plant herbs among your ornamentals for the scent they bring to the garden.  Instead of hidden away in a vegetable bed, rosemary or lavender along a path will release its fragrance every time someone walks by.  You’ll enjoy spicy aroma of thyme if you plant it around stepping stones.

Adding vegetables and herbs into your ornamental beds will also attract more pollinators.  Scatter a few bronze fennel, parsley, thyme, and chive plants throughout the landscape to provide both food and habitat for pollinators.  Unlike pests that eat other herbs, when swallowtail caterpillars defoliate my parsley, I know I can soon look forward to watching the emerging butterflies flit around the garden.

If you have a deer, rabbit or other animal problem, working edibles into your plan may prove more challenging.  Critters know no boundaries when it comes to foraging.  Deer will stay away from many aromatic herbs and velvety or spiky plants like artichokes.  Animals also generally leave the onions, garlic, leeks and chives to us.  You’ll have to experiment to determine what works in your garden.

Some years I have bunnies inside the fenced back yard, and some years I don’t. Last year I discovered a nest of three fuzzy baby bunnies under the oversized artichoke plant inside my fenced vegetable garden.  Needless to say, I left them there where they grew up enough to enjoy my 15 newly planted strawberry transplants next to the artichoke.  I guess that’s the definition or gardening for wildlife.

Whether you want to eat them or look at them, including edibles in your ornamental landscape can be both filling and fulfilling.

Step into your garden to shake off stress

There’s a lot going on right now, and I’m sure you’re looking for some stress relief, escape, and distraction.  Luckily, you only need to look as far as your yard for a place to meditate, exercise, and get your hands in some healing dirt. Studies demonstrate that spending time in a garden can improve our well-being – both physically and mentally.

Shake off the stress

Our lives have been upended.  Working and learning from home is stressful. The strain of uncertainty looms into the future.

According to the American Horticultural Therapy Association, spending time in nature reduces stress, lowers blood pressure and relieves muscle tension.  Being in the garden or completing mindless and soothing garden chores help us fight tension and reduce ‘attention fatigue.’  Studies show as little as 30 minutes of gardening a week can improve self-esteem, reduce anger and ease depression.  And, gardeners are more energetic and less anxious.

How often have  you complained about not having enough time? Now is the perfect time to restore balance and routine to your life.

Can’t go to the gym?

According to the CDC (Centers for Disease Control), “Gardening is an excellent way to get physical activity. Active people are less likely than inactive people to be obese or have high blood pressure, type 2 diabetes, osteoporosis, heart disease, stroke, depression, colon cancer, and premature death.”

The CDC recommends being active for at least 2 1/2 hours per week, and including cardio and muscle strengthening activities.  Gardeners are also more likely to exercise — about 40 minutes longer on average than those who walk or bike.  We know what that means – we set out to tackle one gardening chore, only to get sucked into pulling just a few more weeds or deadheading just a few more flowers.

Gardening can also help people who are recovering from physical illness by strengthening muscles and improving balance and coordination. Be sure to start out slowly if you aren’t used to this kind of activity and always check with your doctor to make sure it’s safe for you to undertake.

Design your own garden workout routine at home.  Gardening chores are excellent exercises and offer anything from soothing stretches to serious cardio. Did you know raking leaves for 30 minutes burns 225 calories – and provides weight training and tones all the major muscles groups in your body.  Choose your chore, from raking, pruning, digging or hauling bags of mulch.

While tackling all the oak sprouts popping up this spring, not only am I clearing out a bed, but whacking at them with the hoe releases pent-up anxiety and helps me achieve a sense of control and accomplishment.

Before you head out to garden, do some stretches to warm up and loosen your muscles.  Remember to bend and lift properly when you’re gardening. Be mindful not to twist while pulling hoses or reaching.

Practice mindfulness in the garden

If gardening isn’t your style, you can still find solace outdoors.  Take your phone or your computer outside and set up a space to meditate or follow online yoga.

Make a plate and eat your lunch outside and listen to the birds.

Now more than ever, we can seek hope and healing in nature.  Gardens inspire us. Beneath the surface of beautiful blooms and stunning structure lies a hidden gem that can also become a vital component of a healthy and balanced lifestyle at this difficult time.

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