My graded swede seed packet

What weight of swede seeds do you need to sow one acre?

When you’re getting ready to buy swede seeds, it is useful to know how many seeds you’ll need for the area you’re sowing. In this article, I will show you the calculations I use to determine the amount of swede seeds needed to sow per acre, accounting for various factors such as seed count per gram, row spacing, and seed density.

Seed count per gram

Swede seeds come in varying sizes and densities, typically ranging from 280 to 480 seeds per gram. This variation influences the total weight of seeds required for sowing one acre.

Graded swede seeds are uniform in size.
Graded swede seeds are uniform in size.

Calculating seeds per acre

  1. Determining Row Spacing and Seed Density: For our calculations, we assume a row spacing of 20 inches and sow one seed every 8 inches within each row.
  2. Calculating Rows per Acre: In a square acre, approximately 125 rows can be accommodated with a 20-inch row spacing.
  3. Determining Seeds per Row: With 8 inches between seeds, each row can hold around 313 seeds.
  4. Total Seeds Required: Multiplying the seeds per row (313) by the number of rows (125) gives us a total of 39,125 seeds needed for one acre.

Estimating seed weight

To determine the weight of seeds required, we use the range of seeds per gram provided earlier (280 to 480 seeds per gram).

  1. Minimum Weight: Calculated by dividing the total seed count (39,125) by the maximum seeds per gram (480), resulting in approximately 81.51 grams.
  2. Maximum Weight: Calculated by dividing the total seed count (39,125) by the minimum seeds per gram (280), resulting in approximately 139.73 grams.

Key points..

When sowing swede seeds, I recommend buying 100 to 150 grams of seeds per acre, depending on the seed density and size. The calculation above uses standard spacing figures and should provide you with a decent crop of swedes.