All about the JP1: the essential professional market gardener seeder
Precision, robustness and versatility — the JP1 seeder by Terradonis (Jang) is a reference companion for direct seeding in bio-intensive market gardening.
Sowing in market gardening is a fundamental but often underestimated operation. Yet good mastery of this stage directly determines the success of crops. For professional market gardeners, even on small plots, it is crucial to have reliable, efficient and precise tools. With this in mind, we present a tool of choice: the JP1 seeder by Terradonis, also known as the Jang.
Why is sowing such a delicate stage?
Even on a micro-farm, sowing properly requires rigor. You must:
- Prepare the soil meticulously (fertilization, refining, surface work),
- Master the density and depth of sowing according to each crop,
- Ensure good post-sowing irrigation to guarantee rapid and uniform germination.
All this requires suitable tools. A professional seeder then becomes an indispensable ally.
Key seeder settings
1. The choice of roller
Each type of seed requires a specific roller, with holes adapted to its size and the desired sowing density. The code used (a letter and a number) makes it easy to find your way around.
2. The brush
It regulates the quantity of seeds that fall into the furrow. It's a fine but essential adjustment.
3. The sprockets
Like a bicycle chain, the seeder uses a sprocket system to define the spacing between seeds. 11 different combinations are possible.
4. The sowing depth
Adjustable thanks to the shoe, depth is essential: we generally sow at twice the size of the seed. A carrot will therefore be sown at just a few millimeters, while a bean can be sown at 2 cm.
Preparing your soil for successful sowing

Before the seeder passes, the bed must be refined, flat and cleared of stones that could hamper the discs. Well-prepared soil is the condition for even emergence.
With the right adjustments made (roller, sprockets, depth), the JP1 lets you sow an entire bed quickly and cleanly. Thanks to its adjustable handlebars and removable elements, it is ergonomic and practical to use.
A good sowing also means not walking on the bed, keeping a regular pace, and not sowing too fast or too slow.
After sowing: irrigation and monitoring
Once the seeds are in the ground:
- Protect the crop (net against pests for crucifers like turnip),
- Irrigate as soon as sowing is finished, especially in dry conditions. Regular sprinkling during the first 10 days is recommended to ensure good emergence.
The JP1 seeder by Terradonis is an essential tool for any professional market gardener, even on a small plot. By combining ease of use, precision and robustness, it saves time and significantly improves the quality of sowings. Investing in a professional seeder means choosing to work with efficiency, consistency, and respect for the needs of crops. It is a trusted companion for over 10 years.