tree

Grapefruit

Citrus x paradisi

The Story

Plant Bio

Citrus x paradisi, the grapefruit, is an evergreen small tree or large rounded shrub with a dense canopy of dark, glossy green leaves. The species produces fragrant white flowers in axillary clusters or solitary blooms during spring, followed by large, bitter-sweet yellow fruit.

The foliage features distinctive winged petioles and a paler green underside, with new growth occasionally showing a light bronze tint. While primarily grown for its edible fruit, the tree provides architectural structure and high humidity tolerance in frost-free climates.

Uses & Benefits:

Provides year-round structure with dense, glossy evergreen foliage and fragrant white spring flowers.

Produces large, edible, bitter-sweet fruit rich in juice, though consumption requires caution with certain medications.

Flowers attract generalist pollinators, including honeybees and native bees.

Essentials

At a Glance

Plant Type

Tree

Height

236"

Width

177"

Light

Full Sun

Zones

9, 10

Water

Moderate

Humidity

High

Native To

Americas / Caribbean

Toxicity

Furanocoumarins cause photosensitization and drug interactions; foliage may cause mild skin irritation.

Bloom period

Spring

In flower about 3 months of the year

Planting

How to Grow

Select a planting site in full sun with deep, well-drained loam or sandy loam soil.
Dig a hole twice as wide as the root ball but no deeper, ensuring the graft union remains well above the final soil line.
Water deeply and regularly during dry spells, directing water to the root zone while keeping the trunk base dry.
Apply a balanced citrus-specific slow-release fertilizer containing iron, zinc, and manganese during the spring and summer active growth phases.

Pro Tip

Never bury the graft union when planting, as burying the root collar traps moisture and invites fatal collar rot.

Keep It Thriving

Care Guide

Do

Keep mulch several inches away from the trunk to prevent crown rot.
Prune lightly to remove dead, crossing, or diseased wood.
Provide consistent moisture during fruit development to ensure quality yield.

Don't

Do not prune heavily into old, leafless wood, as epicormic regeneration is weak.
Do not allow soil to become waterlogged or poorly drained.
Do not use general-purpose fertilizers that lack essential micronutrients like zinc and manganese.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Pest Check
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen TreeEdible GardenCoastal GardenScreening

Multiply

Propagation Methods

Good to Know

Common Questions

Grapefruit questions

What zones can Grapefruit grow in?

Grapefruit is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Grapefruit bloom?

Grapefruit typically blooms in spring through spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Grapefruit need full sun?

Grapefruit does best in full sun (6+ hours).

Is Grapefruit drought tolerant?

Yes — once established (usually after the first full season), Grapefruit handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.