Heirloom

Lemon Bush

Eucalyptus citriodora

Wikimedia Commons

Medium-green, 2-7", sword-shaped leaves that produce a strong citronella fragrance. Leaf and stem tips turn a lovely red color in late summer/fall. Less durable foliage than standard eucalyptus.

Harvest

120-150d

Days to harvest

📅

Sun

Full sun

☀️

Zones

7–10

USDA hardiness

🗺️

Height

2-4 feet

📏

Planting Timeline

Zone:

Jan

Feb

Mar

Apr

May

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Oct

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Dec

Transplant

Showing dates for Lemon Bush in USDA Zone 7

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Zone Map

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Lemon Bush · Zones 7–10

What grows well in Zone 7? →

Growing Details

Difficulty

Moderate

Spacing24-36 inches

WaterRegular; allow top inch of soil to dry between waterings

SeasonTender Perennial

ColorMedium green with red-tipped foliage in late summer/fall

Size2-7"

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
Zone 3	—	June – August	—	—
Zone 4	—	June – July	—	—
Zone 5	—	May – July	—	—
Zone 6	—	May – July	—	—
Zone 7	—	May – June	—	—
Zone 8	—	April – June	—	—
Zone 9	—	March – May	—	—
Zone 10	—	March – April	—	—

Complete Growing Guide

Lemon Bush eucalyptus thrives best when started indoors 6 to 8 weeks before your last spring frost date. Sow seeds directly on moist seed-starting mix without covering them, as they require light to germinate. Keep the soil consistently moist but not waterlogged, and maintain temperatures between 65 and 75 degrees Fahrenheit for reliable sprouting within 10 to 14 days. Once seedlings develop their first true leaves, you can gradually acclimate them to outdoor conditions over 7 to 10 days before transplanting after all frost danger has passed.

Space Lemon Bush plants 18 to 24 inches apart to allow their spreading habit room to develop without crowding. They prefer well-draining soil amended with compost or aged bark to improve structure and prevent root rot, a particular concern with this variety. Choose a location with full sun exposure—at least 6 to 8 hours daily—as this intensifies both the citronella fragrance and the attractive red coloring that develops on leaf tips in late summer and fall. Plant at the same depth they were growing in their containers, firming soil gently around the base.

Water Lemon Bush deeply but infrequently once established, allowing the soil surface to dry between waterings. Young plants benefit from consistent moisture for the first month, but mature plants are relatively drought-tolerant. Feed every 3 to 4 weeks during the active growing season with a balanced, slow-release fertilizer. Avoid over-fertilizing, as excessive nitrogen promotes soft growth that this variety struggles to support consistently.

Watch closely for spider mites and scale insects, which attack Lemon Bush more aggressively than standard eucalyptus varieties, particularly when plants are stressed by inconsistent watering or poor air circulation. The softer foliage that gives this cultivar its charm also makes it more vulnerable to these pests. Inspect leaf undersides regularly and spray with insecticidal soap at the first sign of infestation. Powdery mildew can develop in humid conditions, so ensure adequate spacing for air flow around each plant.

Prune Lemon Bush lightly in early spring to encourage bushier growth and to remove any winter-damaged stems, which appear more frequently on this variety than on hardier eucalyptus types. Pinch growing tips during the first 6 weeks after planting to promote branching. Because the foliage is less durable than standard eucalyptus, avoid heavy cutting that removes more than one-third of the plant at once.

The most common mistake gardeners make with Lemon Bush is overwatering, particularly in cooler months. While the plant enjoys moisture during active growth, waterlogged soil quickly leads to root decline and fungal issues. During winter or in rainy climates, reduce watering significantly and ensure drainage is excellent.

Harvesting

Lemon Bush reaches harvest at 120 - 150 days from sowing per Johnny's Selected Seeds. Expect 2-7" at peak.

many-seeded capsule

Type: Capsule.

Storage & Preservation

Fresh Lemon Bush foliage stores best in a vase of cool water indoors, where it remains fragrant for 7-10 days. Keep the vase out of direct sunlight and change water every 2-3 days to extend vase life. Alternatively, loosely wrap fresh leaves in a damp paper towel and refrigerate in a plastic bag for up to 5 days—though fragrance diminishes more quickly this way.

For longer-term preservation, air-dry leaves by hanging small bundles upside down in a warm, well-ventilated space away from direct sun. Dried Lemon Bush leaves retain fragrance for 3-6 months and can be used in potpourri, dried arrangements, or sachets. Place dried leaves in airtight containers with cotton balls to concentrate and preserve the citronella scent. Another option is to freeze fresh leaves layered between parchment paper in freezer bags—frozen leaves lose some aromatic intensity but work well for herbal infusions or craft projects.

History & Origin

Lemon Bush is open-pollinated, meaning seed saved from healthy plants will produce true-to-type offspring. Listed in the Johnny's Selected Seeds catalog.

Origin: Philippines to Australia

Advantages

+Strong citronella fragrance makes it excellent for natural pest deterrent purposes.
+Attractive red-tipped foliage in fall provides ornamental appeal beyond green leaves.
+Medium growth habit suits container cultivation and smaller garden spaces well.
+Sword-shaped leaves create distinctive visual texture different from typical rounded shrub foliage.

Considerations

-Foliage is notably less durable than standard eucalyptus varieties, bruising easily.
-Requires moderate care and attention, making it unsuitable for neglectful gardeners.
-Long 120-150 day growing period demands patience before reaching mature size.
-Fragrance intensity may diminish if leaves are bruised or handled frequently.

Companion Plants

Lavender, rosemary, and thyme are the natural neighbors here — all three want lean, well-drained soil and 6+ hours of sun, so they won't pull water away from Lemon Bush or shade it out as the season goes on. That aromatic cluster also does real work against aphids and whiteflies, which orient to host plants partly by scent; a dense mixed planting scrambles those cues enough to reduce landing rates. Marigolds add another layer: their root secretions have a documented suppressive effect on root-knot nematodes (Meloidogyne spp.), which matters if your bed has had nematode problems in a previous season.

Fennel needs to stay at least 10 feet away. Its root exudates are broadly allelopathic — they slow germination and suppress growth in a wide range of plants, including most Mediterranean-climate shrubs. Black walnut (Juglans nigra) is a harder constraint: the juglone it produces through roots and decomposing leaves is directly toxic to many woody plants, and Eucalyptus citriodora has no particular resistance to it. Skip any spot within the canopy drip line of an existing walnut. Finally, don't underplant Lemon Bush beneath another eucalyptus species — fallen eucalyptus leaf litter contains its own allelopathic compounds that suppress whatever's trying to grow underneath.

Plant Together

Lavender

Repels aphids, whiteflies, and other citrus pests while attracting beneficial pollinators

Rosemary

Deters citrus pests and has similar water and soil requirements

Thyme

Repels aphids and citrus leaf miners while providing ground cover

Marigolds

Natural pest deterrent against nematodes and aphids

Chives

Repels aphids and may help prevent fungal diseases

Nasturtiums

Acts as trap crop for aphids and adds beneficial insects

Garlic

Natural fungicide and pest deterrent for citrus trees

Comfrey

Deep roots bring up nutrients and leaves make excellent mulch

Keep Apart

Black Walnut

Produces juglone which is toxic to citrus and inhibits root development

Fennel

Allelopathic properties inhibit growth of citrus and most other plants

Eucalyptus

Releases chemicals that inhibit growth and competes aggressively for water

Troubleshooting Lemon Bush

What you'll see, why it happens, and what to do about it.

Leaves developing gray, powdery coating — most visible on new growth first

Likely Causes

Powdery mildew (Erysiphe or Oidium spp.) — triggered by warm days, cool nights, and poor airflow
Overcrowded planting with less than 24 inches between plants

What to Do

1.Cut out the worst-affected stems and trash them — don't compost
2.Open up spacing; if plants are in containers, move them where air circulates on all sides
3.Spray with a diluted neem oil solution (2 tbsp per gallon of water) every 7 days until symptoms stop spreading

Stems blackening at the base, plant wilting despite moist soil

Likely Causes

Root rot from Phytophthora or Pythium — almost always caused by waterlogged soil or a pot without drainage
Planting too deep, burying the stem crown

What to Do

1.Pull the plant and check the roots — brown, mushy roots confirm rot; trim back to white tissue if any remains
2.Repot or replant in fast-draining mix with coarse perlite or grit at 20–30% by volume
3.Water only when the top inch of soil is dry; Lemon Bush is more drought-tolerant than it looks once established

Leaves yellowing uniformly across the plant, no spots, starting in late fall or after a cold snap below 25°F

Likely Causes

Cold damage — Eucalyptus citriodora is marginal in zone 7 and drops leaves or dies back after hard frost
Nutrient washout in containers after heavy rains or high-frequency irrigation

What to Do

1.In zone 7, move container plants indoors before the first frost date; cut back frost-killed stems to live wood in early spring rather than immediately, so you don't remove tissue that might still recover
2.Side-dress with a balanced slow-release fertilizer (10-10-10) once in spring and once in early summer — nothing after August, or you push tender new growth straight into frost season
3.Mulch the root zone 3–4 inches deep for in-ground plants; it won't save the canopy in a hard freeze, but roots often survive and resprout

Frequently Asked Questions

How long does Lemon Bush take to grow to full size?▼

Lemon Bush reaches ornamental maturity and develops its characteristic foliage in 120-150 days from planting. However, continued growth and the development of red-tipped fall coloring accelerate during the plant's second season. For maximum fragrance and color intensity, allow 12-18 months of establishment before expecting peak performance in your garden or container.

Can you grow Lemon Bush in a pot or container?▼

Yes—in fact, container growing is highly recommended for Lemon Bush, particularly in climates with winters below Zone 10. Use a well-draining potting mix blended with perlite, provide 6+ hours of direct daily sunlight, and allow the top inch of soil to dry between waterings. Container cultivation makes seasonal protection easy and allows you to move the plant to optimal light positions, resulting in healthier, more fragrant foliage.

Is Lemon Bush good for beginners?▼

Lemon Bush is moderately easy to grow, requiring consistent (not excessive) watering, full sun, and good air circulation. It's forgiving of minor neglect but sensitive to overwatering and cold temperatures. Beginners should succeed with attention to drainage and light, making it a solid choice for gardeners willing to learn basic shrub care. Starting in containers simplifies seasonal management.

What does Lemon Bush smell like?▼

Lemon Bush emits a strong citronella fragrance—a lemony, slightly herbaceous scent that intensifies when foliage is brushed or gently handled. The aroma is particularly potent in late summer and fall when leaves develop red tips. Fresh-cut foliage or dried leaves retain fragrance for weeks, making it popular for arrangements, sachets, and natural mosquito-repellent applications.

When should I plant Lemon Bush?▼

For best results, plant Lemon Bush in spring after the last frost date, allowing the growing season to establish strong roots before winter. In frost-free climates (Zone 10+), fall planting is acceptable and may reduce transplant stress. For container growing in colder regions, spring planting ensures vigorous growth before you need to move the plant indoors for winter protection.

Why is my Lemon Bush foliage wilting or dropping?▼

Wilting and foliage drop typically indicate overwatering or poor drainage. Lemon Bush's less-durable foliage is particularly sensitive to root saturation and fungal stress from excessive moisture. Ensure soil dries slightly between waterings, improve drainage if growing in-ground, and increase air circulation around the plant. Frost exposure or cold drafts can also cause foliage loss in tender plants—provide winter protection in climates below Zone 10.