Cassettes of size 54x28 cm (Dutch standard)

Seedling Trays – The Key to a Successful Harvest

Seedling trays are modern and effective containers designed for growing seedlings in ideal conditions before they are transplanted. They provide each plant with its own individual space, which promotes the formation of a powerful and healthy root system, minimizing stress during pricking out and transplanting into open ground. Using trays significantly simplifies seedling care, improves their quality, and, as a result, increases future yields.

Key Advantages of Using Seedling Trays

• Optimal Growing Conditions: Each cell provides a separate plant with sufficient light, water, and nutrients.
• Healthy Root System: Promotes the formation of a strong and branched root system within a confined space.
• Reduced Stress: Eliminates the need for pricking out, and during transplanting, the root system remains undamaged, ensuring rapid plant adaptation.
• High-Quality Seedlings: All sprouts develop uniformly, which improves the quality and consistency of the plants.
• Efficiency and Economy: Compact placement of seedlings (up to 300 plants per 1 m²) allows for maximum effective use of greenhouse space and reduces costs.
• Reduced Risk of Diseases: Isolation of plants from one another and quality ventilation prevent the spread of diseases.
• Ease of Use: Trays are easy to transport, account for, and care for, saving time and effort.

The Agreen brand offers high-quality and durable seedling trays made from environmentally safe polystyrene, which guarantees strength, resistance to negative factors, and a long service life.

Features and Selection Criteria

When choosing seedling trays, you should pay attention to key features: the material, wall thickness, dimensions, volume, depth, shape, and number of cells, as well as the presence of additional elements like a lid and a tray.

Material:

• Polystyrene (PS): The material used in the production of Agreen trays. It is characterized by increased strength, resistance to negative factors, and is completely safe for plants and human health.

Unlike PVC, PP, and PET, it does not contain harmful substances and is resistant to temperature fluctuations and mechanical stress.

Wall Thickness:

• from 0.5 to 1.1 mm.

This provides an optimal combination of strength and flexibility.

Tray and Flat Dimensions:

• Polish Standard: 60×40 cm.
• Dutch Standard: 30×17.5 cm; 54×28 cm; 38.5×28 cm.

Cell Volume and Depth:

• Volume (cm³): 7, 9, 20, 21, 26, 38, 45, 51, 55, 60, 70, 100, 130, 170, 178, 300, 350, 390.
• Depth (mm): 25, 37, 40, 42, 45, 46, 48, 50, 55, 60, 63, 65, 80, 90, 100, 110.

Cell Shape:

• Rectangular, Square: Suitable for plants with a wide and branched root system.
• Round (Cylindrical): Provides convenience for planting in the ground.
• Conical: Recommended for plants with deep-growing roots. Allows for easy removal of seedlings without damaging the root system.

Number of Cells:

• 6, 12, 15, 21, 32, 40, 50, 72, 77, 96, 105, 128, 160, 288.

Additional Elements:

• Lid: A transparent lid turns the tray into a mini-greenhouse, creating an ideal microclimate for seed germination. It is removed when the seedlings start to grow.
• Tray/Flat: Used for watering through drainage holes and for protecting surfaces from water. Trays for Agreen flats measuring 54×28 cm are available in retail stores.

Recommendations for Choosing Trays for Different Crops

The choice of tray depends on the specifics of the plant’s root system. By following these recommendations, you can ensure maximum comfort for your seedlings.

• Peppers, Eggplants: Best suited for trays with conical cells of 50-350 cm³ volume and deep cells (height-to-width ratio of 3:1).
• Cucumbers, Watermelons, Melons, Pumpkins: Require large cells (200-300 cm³) with a height-to-width ratio of 2:1.
• Celery, Lettuce, Onions: Small cells (30-50 ml) with a height-to-width ratio of 1:1 are sufficient.
• Tomatoes: For pricking out, first use trays with a volume of 50-70 ml, then transplant into larger ones (200-450 ml) to ensure enough light and space for growth.
• Cabbage: The recommended cell volume is 100-150 ml (height-to-width ratio of 2:1). It is better to use trays with a flat, as cabbage is very demanding of moisture.
• Flowers with Small Seeds (Viola, Petunia): Cells with a volume of 70-150 ml are suitable, preferably with a lid.
• Strawberries: It’s best to choose cubic trays with a depth of 50-60 mm for the development of a branched root system.

Instructions for Use

1. Preparation: Before use, rinse the forms with a warm solution of potassium permanganate and then with clean water.
2. Sowing: Fill the cells 2/3 full with soil and sow 2-3 seeds in each to guarantee sprouting. Later, thin out the seedlings, leaving only one plant per cell.
3. Watering: Water the seeds, then cover the flats with film and place in a warm spot until the first shoots appear.
4. Care: After sprouting, remove the film and provide the plants with the necessary light and water.

We have been wholesaling goods for over 20 years, working with both large companies and small farms. Every offer we make is a profitable and reliable solution for your business.