Comparison · crop
Leafy greens: lettuce vs spinach vs kale vs watercress
Compare leafy salad and cooking greens.
| Dimension | Lettuce | Spinach | Kale | Watercress |
|---|---|---|---|---|
| Category | Vegetable crop | Vegetable crop | Vegetable crop | Aquatic leaf vegetable crop |
| Scientific name | Lactuca sativa | Spinacia oleracea | Brassica oleracea var. acephala (syn. var. sabellica) | Nasturtium officinale |
| Botanical family | Asteraceae (daisy family) | Amaranthaceae (formerly Chenopodiaceae) | Brassicaceae (mustard family) | Brassicaceae (cabbage family) |
| Lifecycle | Annual | Annual | Biennial, grown as an annual for leaf harvest | Annual |
| Common diseases | Downy Mildew, Gray Mold | Downy Mildew, Fusarium Wilt | Downy Mildew, Clubroot | Root Rot, Bacterial Leaf Spot |
| Common pests | Aphids, Slugs, Cutworms | Aphids, Leaf Miners | Aphids, Flea Beetles | Aphids, Snails |
| Suitable soils | Loam Soil, Sandy Soil | Loam Soil, Sandy Soil | Loam Soil, Clay Soil | Sandy Soil, Loam Soil |
Methodology
Descriptive dimensions (family, lifecycle, associated diseases/pests, soils) are read from each crop’s reference entry. No crop is ranked as “better”; agronomic outcomes are region- and system-specific.
Limitations
- Descriptive comparison only — not a yield, profitability, or suitability ranking.
- Associated diseases/pests and soils are typical, not exhaustive, and vary by region.
Sources
This article draws on the following authoritative sources. See our sources & methodology for how they are selected.
- [1]FAO — Food and Agriculture Organization (opens in a new tab)Authoritative
Food and Agriculture Organization of the United Nations (FAO)
- Type:
- Intergovernmental organization
- Jurisdiction:
- Global
- Accessed:
- 2026-07-12
- Authoritative
- Type:
- Reference database
- Jurisdiction:
- United States
- Accessed:
- 2026-07-12