Parsley

Petroselinum crispum

Parsley (Petroselinum crispum) is a biennial, cool-preferring culinary herb. It germinates slowly, likes steady moisture and grows in soil, coco and hydro.

Updated:

Important notes

flowering / 2nd year: In its 2nd year parsley bolts and flowers — leaves turn bitter and apiole rises; avoid large amounts in pregnancy.

sap on skin + sun: Contains furanocoumarins; sap on skin may irritate in sunlight.

Light

Bright to part shade, 12–14 h of light. Tolerates less sun than Mediterranean herbs.

Watering

Keep evenly moist; drought turns it bitter and triggers bolting.

Temperature

Prefers cool: 15–22 °C. Heat triggers premature flowering.

Humidity

50–65 %.

Target values by method & stage

Hydro
Stage pH EC (mS/cm) Water °C Air °C Humidity % Light h Duration (days)
Germination 6–6.5 0.6–1 18–22 18–22 60–70 14 18
Seedling 6–6.5 1–1.4 16–20 15–21 55–65 14 21
Vegetative 6–7 1.4–1.8 16–20 15–22 50–65 14 35
Harvest 6–7 1.2–1.8 16–20 15–22 50–65 13 40
Soil
Stage pH EC (mS/cm) Water °C Air °C Humidity % Light h Duration (days)
Germination 6.3–6.8 0.6–1 18–22 60–70 14 18
Seedling 6.3–6.8 1–1.4 15–21 55–65 14 21
Vegetative 6.3–7.3 1.4–1.8 15–22 50–65 14 35
Harvest 6.3–7.3 1.2–1.8 15–22 50–65 13 40
Coco
Stage pH EC (mS/cm) Water °C Air °C Humidity % Light h Duration (days)
Germination 6–6.5 0.6–1 18–22 18–22 60–70 14 18
Seedling 6–6.5 1–1.4 16–20 15–21 55–65 14 21
Vegetative 6–7 1.4–1.8 16–20 15–22 50–65 14 35
Harvest 6–7 1.2–1.8 16–20 15–22 50–65 13 40

Common problems

Slow, uneven germination (pre-soaking helps), aphids, Septoria leaf spot. Bolts in its second year.

Space & Size

Final height
30 cm
Final width
20 cm
Spacing
15 cm
Root depth
25 cm
Min. container (Hydro)
≥ 2 L
Min. container (Soil)
≥ 3 L
Min. container (Coco)
≥ 3 L

Pests & diseases

Pest / Disease Symptom Organic treatment
Aphids sticky leaves rinse off, beneficials, neem
Septoria leaf spot brown spots with yellow halo remove affected leaves, improve airflow

Edible parts

  • Leaves · edible from Vegetative — main harvest, best young
  • Root · edible from Vegetative — Hamburg parsley only

Yield techniques

Cut the outer stems at the base and leave the heart — it keeps regrowing.

Propagation & pollination

Method
seed
Germination time
21 days
Germination temp
18-24 °C
Sowing depth
1 cm
Pollination
cross
Hand pollination needed
no

slow to germinate; pre-soak helps

Companion planting

🟢 Good neighbours: Tomato, Cherry Tomato

🔴 Bad neighbours: Coriander (Cilantro), Spearmint

Flavor

fresh, slightly peppery

Storage

In the fridge, stems in a glass of water.

History

Parsley comes from the eastern Mediterranean and is one of the oldest culinary herbs — known in ancient Greece.

Nutrition

Rich in vitamin C, K and iron.

Sources

Florabase

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