Parsley
Petroselinum crispum
Biennial herb commonly grown as an annual. Slow to germinate but provides months of fresh leaves for cooking.
Overview
Companion Planting
Tomato
Asparagus
Carrot
Chives
Bell Pepper
Lettuce
MintToxicity
Contains furanocoumarins; large quantities may cause photosensitization and gastrointestinal upset in pets. Safe for humans in normal culinary amounts.
Planting Tips
1 cm of water per m² equals 10 liters. Use the Watering Calculator for exact amounts.
Care Tip: Harvest outer stems first to encourage continuous growth; remove flower stalks promptly to delay bolting.
Common Pests
Aphids
Symptoms: Curled, yellowing leaves with sticky honeydew residue; clusters of small green or black insects on stems and leaf undersides.
Treatment: Spray plants with a strong water jet or apply insecticidal soap to affected areas.
Prevention: Encourage beneficial insects like ladybugs and lacewings; avoid excessive nitrogen fertilization.
Whiteflies
Symptoms: Yellow spots on leaves, sticky honeydew on foliage, and clouds of tiny white insects when plant is disturbed.
Treatment: Use yellow sticky traps and apply insecticidal soap or neem oil sprays.
Prevention: Inspect new plants before introducing them and maintain good air circulation around plants.
Parsleyworm (Black Swallowtail Caterpillar)
Symptoms: Chewed leaves and defoliation; green-yellow-black striped caterpillars visible on foliage.
Treatment: Handpick caterpillars or apply Bacillus thuringiensis (Bt) for larger infestations.
Prevention: Use row covers to exclude adult butterflies from laying eggs on plants.
Common Diseases
Septoria Leaf Spot
Symptoms: Small grayish-brown angular spots on leaves and petioles, leading to yellowing and premature leaf drop.
Treatment: Remove and destroy infected leaves; apply copper-based fungicide if infection is severe.
Prevention: Use certified disease-free seed, practice crop rotation, and avoid overhead watering.
Powdery Mildew
Symptoms: White powdery coating on leaf surfaces, followed by yellowing, curling, and desiccation of affected tissue.
Treatment: Prune infected foliage and apply sulfur-based or biological fungicides such as Bacillus subtilis.
Prevention: Ensure adequate plant spacing for air circulation, water at the base, and plant in sunny locations.
Crown and Root Rot
Symptoms: Wilting despite adequate moisture; roots appear brown and water-soaked instead of white, leading to plant collapse.
Treatment: Remove and destroy affected plants; drench soil with an appropriate fungicide in severe cases.
Prevention: Ensure well-draining soil, avoid overwatering, and rotate crops on a two-year cycle with non-susceptible plants.