Consider the materials.

• Analyze the water source and manage alkalinity.
• Select a uniform, high-quality growing medium with a low and well-mixed nutrient charge.
• Consider tray design.
• Use seeds with high germination rates and acceptable pelleting materials.

Promote uniform emergence.

• Sow seeds during sunny periods.
• Fill trays uniformly.
• Place seeds uniformly (in the center of the dibble).
• Provide a warm temperature (68 to 70°F at night).
• Allow greenhouse temperature to fluctuate between 68°F and 86°F but do not maintain a constant temperature.
• Control ants and mice.

Promote uniform growth.

• Monitor fertilizer salts in the medium and leach with water from overhead when necessary.
• Continue to analyze water and manage alkalinity when necessary.
• Clip properly.
• Manage insects and diseases.

Prevent stand loss.

• Provide proper ventilation and airflow to prevent heat injury.
• Avoid early seeding, high nitrogen rates, and hot daytime temperatures that promote stem rot diseases.
• Steam trays at 176°F (80°C) for 30 minutes or purchase new trays.