White Carob Tree

prosopis alba

Also known as: ["Algarrobo Blanco","White Mesquite"]

Family: Fabaceae Genus: Prosopis Category: Trees

Overview

A deciduous tree native to South America, valued for its hard wood and edible pods.

Benefits & Perks

["drought tolerant","shade tolerant","wildlife attractant (bees, butterflies, birds)"]

Botanical Classification

Phylum: Magnoliophyta
Class: Magnoliopsida
Order: Fabales
Family: Fabaceae
Genus: Prosopis
Botanical Name: Prosopis alba

Plant Characteristics

Basic Information
  • Category: Trees
  • Suitable Location: outdoor garden in open, sunny areas
  • Suitable For:
    Outdoor Landscapers Wildlife Supporters
  • Is Weed: No
  • Allergenicity: low
Environmental Needs
  • Climate: {"temperatureRange":"-10 to 45°C"}
  • Hardiness: {"zones":"7–10"}
  • Misting: rarely required
  • Drainage: Fast-draining to prevent root rot.
  • Soil Type: Well-draining, sandy loam with some organic matter; mimics natural arid conditions.
Maintenance Level
  • Maintenance Level: moderate
  • Toughness Level: high
  • Pruning Frequency: Annually in late winter or early spring before new growth begins.
  • Pruning Intensity: Moderate; remove up to one-third of old growth if needed.
Care Details

Ideal Sunlight Coverage:
Full sun (6–8 hours of direct sunlight daily); tolerates partial shade but may become leggy.

Sunlight Tolerance Tips:
Acclimate gradually if moving from shade to sun; protect from intense midday sun in hot climates; ensure outdoor placement receives ample light.

Warning Signs: Yellowing leaves, root rot, or stunted growth indicate poor drainage or incorrect soil conditions.

Care Requirements

Care Difficulty
moderate

moderate

Sunlight

full sun

Rotate plant for even growth; avoid sudden light changes; provide shade during extreme heat.

Watering

every 7–14 days, depending on climate and soil conditions

Water thoroughly but infrequently; ensure soil dries out between waterings; adjust frequency based on season and weather.

Soil

well-drained, sandy or loamy soil

pH: Slightly alkaline to neutral (pH 6.5–7.5).

Ensure soil dries between waterings; avoid heavy clay soils; amend with grit for drainage.

Temperature

Thrives in warm climates (20–35°C); tolerates mild frosts but prefers temperatures above 10°C.

Protect from frost; avoid sudden temperature swings; adjust watering for heat.

Fertilizing

annually in early spring with a balanced, slow-release fertilizer

Fertilize only during active growth; dilute liquid fertilizer to half strength; avoid nitrogen-heavy formulas.

Propagation

Methods

Stem cuttings or seed; cuttings root more reliably.

Step-by-Step Propagation Guide
  1. Take a 10–15 cm cutting.
  2. Remove lower leaves.
  3. Apply rooting hormone.
  4. Plant in medium.
  5. Keep moist and warm.

Best Time: Spring or early summer when the plant is actively growing.

Environment

Warm (20–25°C), humid, and bright but indirect light; protect from direct sun.

Medium

Well-draining mix of perlite and peat moss or cactus mix.

Hormone

Rooting hormone is recommended for faster and more reliable rooting.

Timeline

Roots may develop in 4–8 weeks; establishment takes 3–6 months.

Tools Needed

Pruning shears, rooting hormone, small pots, well-draining medium.

Quick Tips

Use healthy, non-flowering stems; maintain humidity with a plastic cover; avoid overwatering.

Pruning & Repotting

Pruning Guide
Method

Selective thinning and heading back to shape the plant and improve airflow.

Pruning Plan

Prune to maintain shape, remove deadwood, and encourage bushier growth; focus on structural improvement.

Tools

Pruning shears, loppers, gloves, disinfectant.

Checklist

Disinfect tools; prune dead or crossing branches; make clean cuts; avoid over-pruning.

Repotting Guide
Best Season

Early spring before active growth starts.

Pot Size

Increase pot size by 2–5 cm in diameter; ensure good drainage.

Method

Remove plant gently; trim roots if necessary; repot in fresh, well-draining soil with a slightly larger pot.

Suggestions

Repot every 2–3 years or when roots fill the pot; beneficial for younger plants to encourage growth.

Checklist

Choose appropriate pot size; use fresh soil mix; trim roots if crowded; ensure drainage holes are clear.

Advanced Care Tips

Watering Mastery
Watering Checklist

Check soil moisture before watering; water deeply at the base; ensure proper drainage; adjust for season.

How to Apply Water Properly

Water directly at the root zone until water drains from the bottom; ensure even moisture without waterlogging; water in the morning to reduce evaporation and fungal risk.

Pro Tip: Use a slow trickle to allow water to penetrate deeply into the root zone.
Watering Schedule Tips

Water deeply once every 7–14 days during active growth in spring and summer; reduce frequency to once a month or less in fall and winter, allowing soil to dry completely between waterings.

Soil Improvement

Add perlite or coarse sand to improve drainage; incorporate compost for organic matter.

Temperature Stress Management
Signs of Temperature Issues

Chlorosis or leaf drop in extreme cold; wilting or scorching in excessive heat.

Cold Stress

Growth slows or halts; may experience leaf drop or dieback in prolonged cold.

Solution: Provide frost protection in winter; move to a sheltered location if temperatures drop below 5°C.

Hot Stress

Leaves may wilt, scorch, or drop; growth may slow under intense heat.

Solution: Provide partial shade during peak heat; increase watering frequency; ensure good air circulation.

Fertilizing Guide
Fertilizing Checklist

Use balanced fertilizer; apply in spring; avoid winter feeding; follow package instructions.

Fertilizing Method

Use a balanced, slow-release fertilizer in spring; avoid over-fertilizing; reduce or stop feeding in winter.

Common Problems & Solutions

Yellowing leaves in Prosopis alba may indicate nutrient deficiencies, water stress, or pest infestations, affecting photosynthesis and overall plant health.

Wilting in Prosopis alba can be caused by water stress, root damage, or disease, leading to reduced turgor pressure and potential plant death if not addressed.

Leaf spots on Prosopis alba may be caused by fungal or bacterial pathogens, leading to reduced photosynthetic efficiency and potential defoliation.

Rotting in Prosopis alba, particularly root or stem rot, is often caused by fungal infections or waterlogged conditions, leading to decay and structural instability.

Toxicity Warning

Cats
Slightly Toxic

Prosopis alba is considered slightly toxic to cats if ingested. The seeds and pods contain compounds that can lead to mild gastrointestinal irritation in felines. The toxicity is generally not severe but can cause discomfort.

⚠️ Symptoms:
vomiting diarrhea lethargy depression
🌿 Toxic Parts:
seeds pods
⚡ Toxic If:

if eaten

Prevent cats from accessing Prosopis alba seeds and pods. If ingestion is suspected, consult a veterinarian promptly.
Dogs
Slightly Toxic

The seeds and pods of Prosopis alba can be slightly toxic to dogs if ingested. The plant contains compounds that may cause mild gastrointestinal upset in canines. The effects are typically not life-threatening but can cause discomfort.

⚠️ Symptoms:
vomiting diarrhea lethargy loss of appetite
🌿 Toxic Parts:
seeds pods
⚡ Toxic If:

if eaten

Keep dogs away from Prosopis alba seeds and pods. If ingestion is suspected, contact a veterinarian for guidance.
Humans
Slightly Toxic

Prosopis alba, commonly known as the white algarrobo, contains compounds that can be mildly toxic if ingested. The seeds and pods may contain alkaloids and other secondary metabolites that can cause gastrointestinal distress in humans. The physiological impact is generally limited to mild irritation of the digestive tract.

⚠️ Symptoms:
nausea vomiting abdominal pain diarrhea
🌿 Toxic Parts:
seeds pods
⚡ Toxic If:

if eaten

Avoid consuming seeds and pods of Prosopis alba. If accidental ingestion occurs, seek medical attention if symptoms persist or worsen.
Important: Keep this plant out of reach of children and pets. If ingestion occurs, contact poison control or veterinary services immediately.

Frequently Asked Questions

Q: Is Prosopis alba suitable for urban environments?

A: Yes, it is drought-tolerant and can thrive in arid urban landscapes.

Q: Are the pods of Prosopis alba edible?

A: Yes, the pods are edible and have been traditionally used as a food source.

Q: Does Prosopis alba attract wildlife?

A: Yes, it attracts bees, butterflies, and birds due to its flowers and seeds.

Quick Reference
Family: Fabaceae
Care: moderate
Light: full sun
Water: every 7–14 days, depending o
Suitable For: ["outdoor landscapers","wildlife supporters (attracts bees, butterflies, birds)"]
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