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How to Grow Citrus Cover Crops

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Citrus Cover Crops

Various species (commonly Leguminosae family)

grass

Cover crops grown specifically in citrus orchards to improve soil health, prevent erosion, and provide nitrogen fixation. Common citrus cover crops include legumes like hairy vetch, clover, and Austrian winter pea, as well as grasses like cereal rye. These plants are typically grown between tree rows and incorporated into soil or left as mulch.

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Example Citrus Cover Crops timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Citrus Cover Crops

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Citrus Cover Crops

    Around Jul 16

    ≈ 90 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Citrus Cover Crops dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily minimum
💧
Water: Moderate watering; establish initial moisture, then allow natural rainfall. Most citrus cover crops are drought-tolerant once established.
📏
Spacing: Variable by crop type; typically broadcast seeded at 30-60 lbs/acre inches
📅
Days to maturity: 90-150 days depending on species and season
🌱
Planting depth: 0.25-0.5 inches for small seeds; 1-2 inches for larger legume seeds

Soil

Type: Well-draining loamy to sandy soil typical of citrus orchards
pH: 6.0-7.5
Amendments:
Compost for organic matter Phosphorus if deficient Potassium for soil balance

Growing Zones

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Thrives in zones 8-11, with specific crop choices depending on citrus growing region

8a 8b 9a 9b 10a 10b 11a 11b

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Growth Stages

1

Germination & Seedling

1-2 weeks

Seeds sproute and develop cotyledons and first true leaves over 1-2 weeks.

Ensure consistent soil moisture during establishment. Protect seedlings from foot traffic and heavy machinery.

2

Vegetative Growth

4-8 weeks

Rapid leaf and stem development; plant establishes root system and canopy coverage.

Monitor for competing weeds. Most cover crops begin N-fixation (legumes) or biomass accumulation (grasses) during this phase.

3

Flowering & Maturation

3-6 weeks

Legumes produce flowers and seed pods; grasses develop seed heads. Peak nitrogen content in biomass.

Delay incorporation if maximizing nitrogen fixation. Watch for pest pressure.

4

Senescence & Incorporation

4-8 weeks

Plant material dies back and is tilled or mulched into soil, releasing nutrients.

Incorporate 2-4 weeks before planting citrus or allow 4-6 weeks for decomposition before spring citrus growth resumes.

Companion Planting

Plan your garden →

Plant with:

Citrus trees (primary use) Citrus cover crop mixes (hairy vetch + cereal rye) Clover species Austrian winter pea

Avoid planting near:

Allelopathic crops that may inhibit citrus Heavy-feeding annual crops that compete for nutrients

Common Pests

  • Typically minor in cover crops; remove by hand if excessive. Predatory insects help control populations.

  • Minimize soil disturbance during incorporation. Use beneficial nematodes if severe.

  • Usually tolerable; monitor during peak pest season. Manual removal or organic insecticide if needed.

  • Adequate air circulation between tree rows reduces incidence. Rarely severe in citrus systems.

Uses

🏠

Soil Improvement & Erosion Control

Household

Cover crops prevent soil erosion on sloped citrus orchards, reduce compaction, and improve soil structure. Winter legumes add organic matter and nitrogen, reducing synthetic fertilizer needs. [source]

🍳

Sustainable Citrus Production

Culinary

By fixing atmospheric nitrogen and improving soil health, cover crops reduce production costs and support organic or low-input citrus farming for higher-quality fruit. [source]

🦋

Pollinator & Beneficial Insect Habitat

Wildlife

Flowering cover crops (especially legumes) attract bees, parasitic wasps, and other beneficial insects that pollinate citrus and control pests. [source]

🏠

Weed Suppression

Household

Dense cover crop canopy shades soil and prevents germination of annual weeds, reducing hand-weeding and herbicide use in citrus orchards. [source]

💊

Pathogen & Disease Management

Medicinal

Cover crops can suppress soilborne pathogens through antagonistic microbes and organic matter improvement, reducing citrus diseases like Phytophthora. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Cover crops are not harvested for yield but rather incorporated or mulched in-place. Timing: Incorporate legumes at peak bloom for maximum N content (winter/early spring in most citrus zones). Mow or till 2-4 weeks before active citrus growth. Alternatively, leave standing biomass as mulch and allow gradual decomposition.

Fun Facts

  • 🌱 Hairy vetch and clover can fix 50-150 lbs of nitrogen per acre annually, significantly reducing fertilizer costs in citrus operations.
  • 🌱 Cover crops in citrus orchards increase microbial diversity in soil, creating a more resilient ecosystem that better resists pests and diseases.
  • 🌱 Winter cover crops in Florida and California citrus regions are timed to grow during the cool season when citrus trees are dormant, maximizing land use without competition.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Cover Crop Full Sun Mulch pH True Leaves
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