Also supplied as a fast growth container, a tree container or a plastic container, this is a root-control container: a perforated polyethylene wall that the root system is grown against on purpose.

There are small holes at the top of the concave-convex surrounding, and those holes are the working part of the container. A main root that reaches the wall is guided into the opening, where the root tip is exposed to air instead of to moist substrate. The tip stops extending, and the plant answers by pushing out side-roots further back along the root system. This is the air shear effect the container is built around, and it is why the growth it produces is described as a remarkable increase in roots rather than simply a bigger root ball.

The bottom of the container works with the wall. It controls the main root from twisting, so the root system that develops is a branched one spread through the volume of the container rather than a single root coiled around the base. The plants in the photos above are growing in exactly this way, out in the open on a nursery row, staked as they grow.

The container consists of three parts - bottom, surrounding and fastening - and each has a job. The bottom carries the plant and controls the main root. The surrounding is the concave-convex perforated wall that carries out the air shear. The fastening closes the container and holds it solid; it is easy to use and it is what makes the whole unit practical to assemble on a nursery bench or in the field.

The arrangement matters at the end of the cycle as much as at the start. Because the root system develops against a perforated band rather than coiling against a solid wall, the result at transplanting is that there is no root twisting, no broken roots and no injured roots when the plant is lifted. The fastening holds the surrounding solid for as long as the plant is in the container, and the container itself is described as easy to use and great value.

Transplanting is where the container has to prove itself, because every root that is broken or injured at that moment is a setback the plant has to recover from before it can grow away. According to the theory of air shear the container controls main-root cultivation effectively, improves the growth of side-roots, and does not lead to root twisting, broken roots or injured roots during transplanting. On that basis the survival rate is over 98%.

The second effect is timing. Through the double effect of root control by the container and by the substrate, the seedling stage has been shortened by 30-50% compared to common ways. Plants that are ready earlier free bench space and let a nursery run more than one cycle in a season.

If the container is being used to finish plants for sale rather than to raise them, the trays and pots the plants started in are listed with the rest of the planting tools range, including the 32-cell seed tray seedlings are normally raised in and the square PP seed planter used for potting on.

1. Material : polyethylene.
2. Working life : economic use of over 5 years.
3. Construction : three parts - bottom, surrounding and fastening.
4. Diameter : 20 cm to 2 m.
5. Height : 20 cm to 80 cm.
6. Dimension : diameter multiplied by height multiplied by 3.14.
7. Sizes : it can be used in any size within the range above.

The diameter is chosen from the root volume the plant needs and the height from how deep the container can stand on the bench or in the field, so the two figures are quoted together: 20 cm to 2 m in diameter, 20 cm to 80 cm in height. Send the species, the size of plant you are finishing and the container size you have in mind, and we will confirm the combination together with the quantity and packing.

Reference material on nursery and transplanting practice is published by the USDA, and day-to-day commercial nursery practice is reported by HortiDaily.

We are the manufacturer specialize in greenhouse and planting tools with above 35 years. We supply over 1,200 different kinds of planting tools. Our planting tools are widely use by farm and agricultural sciences academy and institute at home and abroad. We exported our products more than 120 different countries all over the world.

As part of the greenhouse equipment range, the containers can be quoted together with benches, irrigation and structures for the same project.

Q: How does the air pruning actually work?
A: Small holes are set in the top of the concave-convex surrounding. A root tip that reaches one of those holes meets air instead of moist substrate, stops extending, and the plant pushes out side-roots further back. The bottom of the container separately stops the main root from twisting.

Q: Will the roots be damaged when the plant is lifted?
A: The container does not lead to root twisting, broken roots or injured roots during transplanting, and on that basis the survival rate is over 98%. What is lifted is a branched root system spread through the container rather than a single main root coiled around the base.

Q: What sizes is the container made in?
A: Diameter 20 cm to 2 m and height 20 cm to 80 cm. It can be used in any size within that range, and the two figures are quoted together because the diameter follows the root volume and the height follows the depth available.

Q: What is the container made of, and how long does it last?
A: Polyethylene, with an economic working life of over 5 years. The material is 100% food grade, with no industrial powder or reclaimed material and no foreign smell, and it is packed under a GMP standard system in a dust-free workshop.

Q: How much earlier is a plant ready?
A: Through the double effect of root control by the container and by the substrate, the seedling stage is shortened by 30-50% compared with common ways. Earlier readiness frees bench space and allows an extra cycle in the season.

Q: Can the container be used more than once?
A: Yes. It is supplied as three parts - bottom, surrounding and fastening - and it carries an economic working life of over 5 years, which is the figure to plan repeated use against.

If you need to ask a question and get some help to find the best greenhouse for you, then just call us on +86 191 5068 3942 or send E-mail to sales@cngreenhouses.com