Seed Calculator
Results
How Many Seeds Do You Need Per Square Foot?
The number of seeds required depends on plant spacing, bed size, and germination rate. Smaller crops like lettuce or carrots require more seeds per square foot, while larger plants such as tomatoes or zucchini need significantly fewer.
What Affects Seed Quantity in a Garden Bed?
- Plant Spacing: Crops with tight spacing require more seeds per square foot.
- Germination Rate: Not all seeds sprout, so extra seeds may be needed.
- Bed Size: Larger garden beds naturally require higher seed quantities.
- Plant Type: Leafy greens require more seeds than fruiting plants.
- Thinning Practices: Some crops are planted densely and thinned later.
How to Calculate Seed Spacing Accurately
To calculate seed quantity accurately, multiply your bed area by the recommended spacing for your chosen crop. Most seed packets include spacing guidelines. Using a structured calculator reduces waste, saves money, and improves crop yield.
Frequently Asked Questions
How many seeds should I plant per hole?
Most gardeners plant 2–3 seeds per hole to ensure germination, then thin to the strongest seedling.
Should I plant extra seeds for safety?
Yes, especially if germination rates are uncertain. Planting slightly more seeds accounts for non-sprouting seeds.
Does seed size affect spacing?
Yes. Larger seeds generally require more space between plants, while small seeds can be planted more densely.