Nursery Pots
Lawn & Garden · 8 specs
Direct Answer
Plant nursery containers are standardized by ANSI Z60.1 into 'Trade Gallons', where a nominal #1 Trade Gallon holds approximately 0.70–0.80 liquid gallons (2.6–3.0 L) and measures 6.0–6.5 inches in diameter, rather than a full US liquid gallon.
Source: ANSI Z60.1 (American National Standard for Nursery Stock) / Association of American Nurserymen · Last reviewed Aug 28, 2026
Specs
| Governing Standards | ANSI Z60.1 (Nursery Stock Specifications) |
| #1 Trade Gallon (1 Gal) | Top: 6.0–6.5" (15–17 cm) | Depth: 6.5–7.0" (17–18 cm) | True Vol: 0.70–0.80 liquid gal (2.6–3.0 L) |
| #2 Trade Gallon (2 Gal) | Top: 8.5–8.75" (22 cm) | Depth: 8.5" (22 cm) | True Vol: 1.5–1.6 liquid gal (5.7–6.0 L) |
| #3 Trade Gallon (3 Gal) | Top: 10.5–11.0" (27 cm) | Depth: 9.5–10.0" (24–25 cm) | True Vol: 2.6–2.9 liquid gal (9.8–11.0 L) |
| #5 Trade Gallon (5 Gal) | Top: 10.75–12.0" (27–30 cm) | Depth: 10.5–11.5" (27–29 cm) | True Vol: 3.6–3.9 liquid gal (13.6–14.8 L) |
| #7 Trade Gallon (7 Gal) | Top: 14.0" (35.6 cm) | Depth: 11.5" (29.2 cm) | True Vol: 6.0–6.5 liquid gal (22.7–24.6 L) |
| #15 Trade Gallon (15 Gal) | Top: 17.5–18.0" (44–46 cm) | Depth: 15.0" (38 cm) | True Vol: 13.0–13.5 liquid gal (49.2–51.1 L) |
| Standard 1020 Flat | 11.0 × 21.25 × 2.4 inches (28 × 54 × 6 cm) | Standard 72-cell plug seedling flat |
ANSI Z60.1 Nursery Container Sizing Matrix
| Trade Pot Size | Nominal Top Diameter | Nominal Depth | True Liquid Volume (Gallons) | Metric Volume (Liters) |
|---|---|---|---|---|
| #1 Trade Gallon | 6.0"–6.5" (15–17 cm) | 6.5"–7.0" (17–18 cm) | 0.70–0.80 gal | 2.6–3.0 L |
| #2 Trade Gallon | 8.5"–8.75" (22 cm) | 8.5" (22 cm) | 1.50–1.60 gal | 5.7–6.0 L |
| #3 Trade Gallon | 10.5"–11.0" (27 cm) | 9.5"–10.0" (24–25 cm) | 2.60–2.90 gal | 9.8–11.0 L |
| #5 Trade Gallon | 10.75"–12.0" (27–30 cm) | 10.5"–11.5" (27–29 cm) | 3.60–3.90 gal | 13.6–14.8 L |
| #7 Trade Gallon | 14.0" (35.6 cm) | 11.5" (29.2 cm) | 6.00–6.50 gal | 22.7–24.6 L |
| #15 Trade Gallon | 17.5"–18.0" (44–46 cm) | 15.0" (38 cm) | 13.0–13.5 gal | 49.2–51.1 L |
| 1020 Seedling Flat | 11.0" × 21.25" | 2.4" (6 cm) | — | Fits 32, 50, or 72 cell inserts |