North America Non-native Plant

Lemon

Botanical name: Citrus ×limon

USDA symbol: CILI5

Life cycle: perennial

Habit: shrub

Native status: Non-native, reproduces and persists in the wild in the lower 48 states âš˜ Non-native, reproduces and persists in the wild in Pacific Basin excluding Hawaii âš˜ Non-native, reproduces and persists in the wild in Puerto Rico  

Synonyms: Citrus limon (L.) Burm. f., database artifact (CILI)   

Growing Lemons: What You Need to Know About This Popular Citrus Few things say homegrown goodness quite like plucking a fresh lemon from your own tree. The lemon (Citrus ×limon) has become a beloved addition to gardens across warmer regions of the United States, bringing both beauty and bounty to ...

Growing Lemons: What You Need to Know About This Popular Citrus

Few things say homegrown goodness quite like plucking a fresh lemon from your own tree. The lemon (Citrus ×limon) has become a beloved addition to gardens across warmer regions of the United States, bringing both beauty and bounty to landscapes. But before you rush out to plant one, let’s explore what makes this citrus tick and whether it’s right for your garden.

The Basics: What Is a Lemon Tree?

Botanically known as Citrus ×limon, the lemon is a perennial shrub that typically grows as a multi-stemmed woody plant. While usually staying under 13-16 feet in height, these plants can sometimes grow taller or develop a single trunk depending on growing conditions. The × in the scientific name indicates this is actually a hybrid species – nature’s way of mixing and matching to create something deliciously useful.

Not a Native, But Not a Problem

Here’s something that might surprise you: lemons aren’t native to the United States. This citrus originally hails from Southeast Asia, likely northeastern India. In the U.S., you’ll find established populations in Florida, Guam, Palau, and Puerto Rico, where the warm climate allows them to reproduce and persist on their own.

While lemons are non-native, they’re not considered invasive or noxious weeds, so you won’t be contributing to ecological mayhem by growing one. However, if you’re passionate about native plants, consider exploring native alternatives that can provide similar benefits to your local ecosystem.

Why Gardeners Love Lemon Trees

There’s a lot to love about lemon trees beyond just the fruit. Here’s what makes them garden favorites:

  • Year-round beauty: Glossy, dark green leaves provide constant visual appeal
  • Fragrant flowers: Small white blossoms fill the air with sweet citrus perfume
  • Bright yellow fruit: Nothing beats the cheerful pop of color from ripe lemons
  • Pollinator magnet: Those fragrant flowers are bee magnets, supporting local pollinators
  • Edible landscaping: Beauty you can actually use in your kitchen

Where Lemon Trees Thrive

Lemon trees are definitely not cold-weather champions. They’re suited for USDA hardiness zones 9-11, which means they need protection from frost and freezing temperatures. If you live in a colder climate, container growing might be your ticket to lemon success – just be prepared to bring your tree indoors when winter arrives.

These trees are classified as obligate upland plants, meaning they almost never occur in wetlands. They much prefer well-draining soil and won’t tolerate soggy conditions.

Perfect Garden Settings

Lemon trees shine in several garden styles:

  • Mediterranean gardens: Natural fit alongside olive trees, lavender, and rosemary
  • Edible landscapes: Combine beauty with productivity
  • Container gardens: Perfect for patios, decks, and small spaces
  • Subtropical landscapes: Complement other warm-climate plants

Growing Your Lemon Tree Successfully

Ready to try your hand at lemon growing? Here’s what these citrus trees need to thrive:

Location and Soil

Choose a spot with full sun – at least 6-8 hours of direct sunlight daily. Well-draining soil is absolutely crucial; lemons hate wet feet and will quickly develop root problems in soggy conditions.

Watering and Feeding

Keep soil consistently moist but not waterlogged. During growing season, regular fertilization with citrus-specific fertilizer will keep your tree happy and productive.

Cold Protection

In zones 9-10, be prepared to protect young trees from unexpected cold snaps. Frost cloth, strategic placement near south-facing walls, or simply growing in containers you can move indoors all work well.

Pruning and Maintenance

Light pruning helps maintain shape and removes dead or crossing branches. The best time is late winter or early spring, just before new growth begins.

Supporting Your Local Ecosystem

While lemon trees do provide some benefits to pollinators through their nectar-rich flowers, consider complementing your lemon tree with native plants that offer more comprehensive wildlife support. Native flowering shrubs, trees, and perennials will provide food and habitat for local birds, beneficial insects, and other wildlife throughout the seasons.

Growing a lemon tree can be a rewarding experience that brings beauty, fragrance, and fresh fruit to your garden. Just remember to provide the warm, sunny conditions these non-natives crave, and you’ll be enjoying homegrown lemons before you know it!

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Atlantic and Gulf Coastal Plain

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Caribbean

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Lemon

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Sapindales

Family

Rutaceae Juss. - Rue family

Genus

Citrus L. - citrus

Species

Citrus ×limon (L.) Burm. f. (pro sp.) [medica × aurantifolia] - lemon

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA