1. occurring or done before planting seeds or crops
Usage: commonly used in agriculture and gardening contexts

1. to plant something in advance or beforehand
Usage: less common than the adjective form

Examples

• The farmer applied preplant fertilizer to prepare the soil.
• Preplant herbicides help control weeds before crops emerge.
• We need to complete preplant inspections before the growing season begins.
• The gardener decided to preplant bulbs in the fall for spring blooms.
• Preplant soil testing revealed nutrient deficiencies in the field.