How to plant vegetable crops with the Jang JP1 and JP5 seeder
Free crop-by-crop growers notes for the Jang seeder: roller and sprocket settings, rows per bed, seed per bed, timing and yields, plus bed prep, cultivation and harvest. Developed with farmers Erich Schultz of Steadfast Farm and Seth Davis.
Settings for 10 crops
All settings work on both the JP1 and JP5, for a 30″ bed with the brush down unless noted. Click a crop for the full guide and a printable two-page PDF.
| Crop | Roller | Sprockets (front x rear) | Rows | Seed per 100′ bed | Days to harvest |
|---|---|---|---|---|---|
| Arugula | X24 | 14 x 9 | 10 | 105 g | 21 (baby) |
| Baby kale | F24 | 14 x 9 | 10 | 315 g | 30 |
| Baby lettuce | F24 | 14 x 9 | 10 | 145 g | 28 |
| Baby spicy greens | F24 | 14 x 9 | 10 | 200 g | 21 |
| Baby brassica greens | F24 | 14 x 9 | 10 | 200-315 g | 21 |
| Carrots | X24 | 14 x 10 | 6 | 20 g | 36 baby, 55 full |
| Radishes | F24 | 14 x 10 | 10 | 130 g | 22 |
| Salad turnips | Y24 | 14 x 10 | 6 | 15 g | 35 |
| Spinach (full size) | F24 (brush medium-high) | 14 x 9 | 6 | 190 g | 55 |
| Snap peas | BL12 | 11 x 11 | 2 | ~200 g | 60 |
For baby spinach (LJ24, 10 rows) and more crops, including beans, beets, corn and onions, see the Jang seeding chart.
JP1 or JP5?
JP1: one row
The classic single-row Jang and the market-garden standard. Made in South Korea with a steel frame, it handles seed from carrots and arugula up to peas and corn, at 0.5″ to 20″ spacing, in wet, dry, rocky or residue-heavy soil. JP1 tech sheet
JP5: five rows
Five hoppers on a 15″ frame with one chain box. Ten rows on a 30″ bed in two passes, rows 3″ apart, with no row marking. The best fit for high-volume salad greens and baby roots. JP5 tech sheet
From bed prep to packing
Each crop guide covers the seeder settings, recommended cultivars, days to maturity and target yield per 100′ bed, the tools you’ll need, and step-by-step notes for bed preparation, seeding, irrigation, cultivation, harvest, and washing and packing. Use them as a starting point and adjust for your climate and soil.
New to the Jang? Start with how to choose a seed roller.
Keep going
The Jang Seeder Handbook
Free 14-page guide: parts, sprockets, rollers, multi-row seeders, comparisons, tips and care.
Jang tech sheets
JP1, JP5, and rollers & sprockets, one printable page each.
Shop Jang seeders
JP1, JP5, seed rollers, hoppers and accessories at Modern Grower.
Questions? Email hello@moderngrower.co.