Justin Hancock
Author of The New Complete Guide to Houseplants
&
Director of Research & Content, Costa Farms
Houseplant Popularity
Houseplant care has never been more popular. Unfortunately, plant advice has never been more confusing. One source says to water every week. Another says never follow a schedule. Your calathea develops brown edges, your monstera hasn't grown in months, and somehow your pothos keeps thriving no matter what you do.
It's easy to feel like you're doing something wrong. But most plant owners don't need more rules. They need a better understanding of how plants work. That’s been Justin’s mission throughout his career: helping people move beyond guesswork and grow with confidence.
Through decades spent growing plants, researching them, writing about them, and helping plant lovers solve problems, he has shown people not just what to do, but why plants respond the way they do.
Justin believes successful plant care starts long before the watering can. It begins with understanding your environment, choosing plants that fit your space and lifestyle, and learning to recognize what your plants are telling you. That philosophy is at the heart of The New Complete Guide to Houseplants, a practical, approachable resource designed to help anyone become a more confident plant parent.
Whether you're caring for your very first houseplant or building a collection you've spent years growing, Justin's goal is simple: To help you understand your plants well enough that caring for them feels natural, rewarding, and enjoyable.
Your Plant Journey Starts Here
Bring home Justin Hancock’s easy-to-follow houseplant guide and discover simple, practical tips for growing happier, healthier plants at home.
Start With The Right Plant
One of the biggest mistakes plant owners make isn't watering incorrectly. It's choosing a plant that isn't suited to their environment.
A plant that's happy where it's growing is dramatically easier to care for than one that's fighting its surroundings every day. That's why understanding your home comes before choosing your plants. When you choose plants that fit your light, space, and lifestyle, success comes much more naturally.
Understand Your Environment
Most plant care advice begins with the plant. Justin believes success begins with understanding your home.
Light, humidity, temperature, and airflow all influence how a plant grows. Once you understand those conditions, it becomes much easier to choose the right plants, place them appropriately, and give them the care they need.
Learn the "Why"
Healthy plant care isn’t about memorizing instructions. It’s about understanding why plants respond the way they do.
When you understand what causes yellow leaves, brown tips, stalled growth, or other common problems, you can respond to what your plant is telling you instead of relying on guesswork.
Expert Houseplant Growing Advice For Everyone
The New Complete Guide to Houseplants brings Justin’s approach to plant care together in one practical, approachable resource. Rather than asking readers to memorize rigid instructions, the book helps them evaluate their environment, choose plants suited to their space and lifestyle, and recognize how plants respond to light, water, humidity, and everyday care.
Drawing on decades of professional growing experience and thousands of questions from plant lovers, Justin explains not only what to do, but why it works. The result is a guide designed to cut through conflicting advice and help readers make more confident decisions in their own homes.
Inside, you'll discover:
- How to choose plants that match your space and lifestyle
- How light, humidity, temperature, and other environmental conditions affect plant growth
- Better watering habits without relying on schedules
- Practical guidance for feeding, repotting, and propagation
- Solutions for common houseplant problems
- Profiles of dozens of popular houseplants
- Full-color photography throughout
Whether you're buying your first pothos or expanding a collection of rare tropical plants, this guide helps remove the guesswork from indoor gardening.
All About Justin
His Career
As Director of Research & Content at Costa Farms, he works with plant trials, emerging varieties, consumer education, and the translation of horticultural science into practical guidance plant lovers can use at home. Previously, he served as horticultural editor for Better Homes & Gardens, and today he hosts the Plant Rx Houseplant Podcast.
His Book
The New Complete Guide to Houseplants distills Justin's decades of hands-on experience into practical, approachable guidance for choosing, growing, and troubleshooting houseplants in any home. With profiles of dozens of popular varieties and full-color photography throughout, it helps readers grow with confidence — available December 1, 2026.
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The New Complete Guide to Houseplants
Expert houseplant growing advice for everyone, by Justin Hancock. A practical, approachable resource designed to help anyone become a more confident plant parent.
Pre-Order Today