A colorful garden featuring clusters of yellow, purple, and pink flowers, various grasses, and shrubs, with trees and sunlight in the background - Photo Courtesy of Proven Winners. A colorful garden featuring clusters of yellow, purple, and pink flowers, various grasses, and shrubs, with trees and sunlight in the background - Photo Courtesy of Proven Winners. A colorful garden featuring clusters of yellow, purple, and pink flowers, various grasses, and shrubs, with trees and sunlight in the background - Photo Courtesy of Proven Winners.
A colorful garden featuring clusters of yellow, purple, and pink flowers, various grasses, and shrubs, with trees and sunlight in the background - Photo Courtesy of Proven Winners.

Water Wisely: How to Build a Drought Tolerant Garden

heidi grasman |  july 15, 2026

It's mid-July. The hose is out every other day, the water bill is climbing, and a few plants still look like they're auditioning for a wilting competition despite your best efforts. Sound familiar? You're not alone, and more importantly, there's a better way. Building a garden that handles summer heat without demanding constant irrigation is entirely possible, and it doesn't require a complete overhaul. It takes smarter watering habits, a little soil prep, and the right plants. Get all three working together and you'll spend a lot less time dragging the hose around this time next year.

 

Here's what this guide covers:

  • The most common watering mistake and the fix that changes everything
  • How smart irrigation technology takes the guesswork out of when to water
  • Why mulch is the most underrated water-saving tool in the garden
  • How to choose plants that are genuinely drought tolerant once established 

The Biggest Watering Mistake Most Gardeners Make

Here's the gardening irony nobody tells you about: frequent shallow watering, the approach most gardeners default to, actually makes plants less drought tolerant over time, not more.

 

When you water a little every day, moisture stays in the top few inches of soil where it evaporates quickly in summer heat. Roots follow the water, which means they stay shallow, right in the zone that dries out fastest. You've essentially trained your plants to be helpless without you. They're not drought tolerant. They're drought dependent.

 

The fix is counterintuitive but simple: water less often, but for longer. Deep, infrequent watering pushes moisture down into the soil profile and roots follow it there. A plant with roots reaching a foot or more into the ground can find moisture that the surface gave up on days ago. That's genuine drought tolerance and it costs nothing to start today.

 

One important note: this applies to established plants. Anything in its first season still needs consistent moisture while its roots settle in, drought-tolerant label or not. The payoff comes in year two. 

Water More Effectively with Smart Irrigation 

Watering deeply is the goal. The right tools make it a lot easier and stop water from being wasted in the process. 

Soaker hoses and drip irrigation are worth every penny for water-conscious gardeners. Instead of spraying water into the air where a good chunk evaporates before it reaches the ground, these systems deliver moisture directly to the root zone slowly and evenly. They also keep foliage dry, which is a nice bonus for disease prevention. A soaker hose woven through a perennial bed is one of the simplest upgrades you can make and one of the most effective.

 

Smart irrigation controllers are where technology really earns its place in the garden. Basic timers water on a fixed schedule no matter what. That means your system merrily runs the morning after a soaking rain. Smart controllers connect to local weather forecasts and actual rainfall data and adjust automatically. If it rained last night, they know. If a heat wave is coming, they adjust. For gardeners who want to stop thinking about irrigation entirely, a smart controller is about as close to a set-it-and-forget-it solution as the garden offers. 

A couple of lower-tech strategies worth mentioning: always water in the morning so foliage dries before nightfall (wet leaves overnight is an open invitation for disease), and group plants with similar water needs together. When your drought-tolerant plants and your thirsty annuals have their own beds, you can water them on their schedule without overwatering the rest of the garden to compensate.

Soil and Mulch: More Powerful Than You Might Think 

Even the smartest irrigation system wastes water if the soil can't hold it. This is where a little preparation pays off for years.

Organic matter is the great equalizer. Sandy soil drains so fast that water moves through before roots can absorb it. Clay soil sheds water or holds it so tightly that roots can't breathe. Compost fixes both and it's one of the few things in gardening that works for opposite problems simultaneously. Work it into your beds before planting and you've given every plant a better shot at handling dry stretches on its own. Our spring soil prep guide has everything you need to get started.

 

Mulch is the real hero of the water-wise garden. A 2–3 inch layer across your beds dramatically reduces evaporation, keeps soil cooler when temperatures climb, and cuts watering frequency in a way that adds up significantly over a summer. Shredded bark works beautifully in traditional borders. Gravel or crushed stone is a great fit for Mediterranean-style plantings with lavender and salvia. It suits the aesthetic and doesn't hold excess moisture around plants that prefer to stay dry at the crown.

A couple of lower-tech strategies worth mentioning: always water in the morning so foliage dries before nightfall (wet leaves overnight is an open invitation for disease), and group plants with similar water needs together. When your drought-tolerant plants and your thirsty annuals have their own beds, you can water them on their schedule without overwatering the rest of the garden to compensate.

Choosing Plants That Actually Mean It When They Say Drought Tolerant 

Plant selection is where the long-term payoff of a drought-tolerant garden really lives but a couple of things are worth understanding before we talk about what to grow.

 

"Drought tolerant" means drought tolerant once established. Almost every plant needs regular moisture through its first growing season while it gets its roots sorted out. The drought tolerance you're paying for arrives in year two. Don't pull something that looks stressed in its first July, give it a chance to prove what it's actually capable of.

 

Native doesn't automatically equal drought tolerant. It's a logical assumption, but it's not reliable. A native wildflower that evolved along a boggy streamside needs just as much water as any exotic from similar conditions. Choose plants based on their actual moisture preferences, not their passport.

 

With those caveats in hand, here are the plant types that genuinely deliver once they're settled in: 

Ornamental grasses are the unsung drought heroes of the summer garden. Their deep fibrous roots find moisture well below the surface zone that dries out first, and they're naturally adapted to hot, open, exposed conditions. Once established, most ornamental grasses practically laugh at dry spells.

 

Perennial salvia evolved in Mediterranean climates with hot summers, lean soil, and intense sun. So the conditions that stress other plants are essentially home turf. Long blooming, low water, fragrant, and pollinator-friendly. It's hard to ask more from a perennial. 
 

Echinacea (Coneflower) is a native prairie plant with a deep tap root that reaches moisture other plants can't access. Its drought tolerance is an evolutionary adaptation to hot, open prairies. Established coneflowers handle dry stretches with ease while still putting on a terrific pollinator show. 

Sedum/Stonecrop stores water directly in its succulent foliage, essentially carrying its own water bottle. It thrives in lean, fast-draining soils where other plants throw in the towel, making it one of the best options for the spots in your garden that seem to defeat everything else.

 

Drought-tolerant shrubs bring deep woody root systems that are naturally more drought resilient than most perennials. Diervilla, Aronia, and Butterfly Bush are standout performers. All deer resistant, genuinely adapted to dry conditions, and capable of providing real multi-season interest without much water input after year one.

 

I put together a video walking through some of my favorite drought-tolerant plants for full sun gardens — if you're trying to narrow down which varieties to try this season, it's a great place to start.
Alt image

In this video, I share some top picks of full sun drought-tolerant plants from the trial gardens at Walters Gardens. These perennials bring color and texture to your garden all season long without demanding a ton of water or maintenance.

For a deeper look at specific varieties across all of these categories, our Tips for Growing Drought Tolerant Plants guide is a great next read. And if your challenge is a specific problem location, such as a south-facing foundation bed, a baking slope, or a hell strip, our guide to hot, dry spots covers targeted solutions for each one.

It All Works Better Together 

Here's the thing about drought-tolerant gardening: each piece of this puzzle works better when the others are in place too. A drought-tolerant plant still struggles in compacted soil that sheds water before roots can absorb it. Great soil prep is wasted if shallow watering keeps roots near the surface. And Smart irrigation controllers take the guesswork out of when to water.

 

When watering habits, soil, mulch, and plant selection all work together that's when a garden can go a week or two between waterings in July without looking the worse for it.

 

The good news is you don't have to overhaul everything at once. Change your watering habits today. Add mulch this season. Let plant choices shift gradually as the garden evolves. Each step builds on the last, and by next summer you'll find the hose stays in the garage a lot more often than it used to. 

Frequenty Asked Questions

What makes a garden drought tolerant? 

A drought-tolerant garden combines three things: watering practices that encourage deep root development, soil and mulch that help retain moisture between waterings, and plants that are genuinely adapted to dry conditions once established. No single element does the job alone, they work together as a system. 

How often should I water a drought-tolerant garden? 

Once plants are established, typically after their first full growing season,  most drought-tolerant perennials and shrubs only need watering during extended dry spells of two weeks or more. During that first season, water deeply two to three times per week rather than a little every day to encourage roots to grow deep rather than stay near the surface.

What are the best drought-tolerant plants for summer?

The most effective steps are ensuring the plant is getting enough direct sunlight (six or more hours for most flowering plants), feeding with a bloom-focused fertilizer that's lower in nitrogen and higher in phosphorus, deadheading spent flowers regularly to redirect the plant's energy into new bloom production, and watering consistently so the plant isn't stressed. For perennial salvias, yarrow, and other repeat bloomers, cutting plants back after each flush of flowers triggers a fresh round of blooming. 

Does mulch really help conserve water?

Absolutely, it's one of the highest-impact things you can do for a water-wise garden. A 2–3 inch layer of mulch dramatically reduces evaporation from the soil surface, keeps roots cooler during peak heat, and meaningfully reduces how often you need to water. It also suppresses weeds that compete for moisture. The return on a bag of mulch is genuinely hard to beat. 

About the Author: Heidi Grasman is the co-owner of Garden Crossings and has spent over 30 years getting her hands dirty developing a deep, practical knowledge of plants, garden design, and what actually works in the ground. She travels throughout the year visiting trial gardens and attending industry conferences to stay on the cutting edge of new plant introductions, and has been a featured speaker at Proven Winners events including the Grand Garden Show on Mackinac Island. A teacher at heart, Heidi's greatest reward is hearing from customers who've found their green thumb after following her advice. 

Back to Blog