How to Read a Seed Packet
The back of a seed packet lists all the information one needs to directly sow seeds in the ground. Let’s go through it item by item with this Cauliflower variety, Early Snowball and Carrot variety, Scarlet Nantes.
The Latin name isn’t always given but it’s a good idea to note the family name for rotation purposes. Brassica is the genus name, oleracea is the species. (See Making Sense of Botanical Names for more on proper name classification)
1) Planting Depth – When we make a trench to lay our seeds the distance from the soil line to the bottom of the trench is the planting depth.
2) Seed Spacing – Refers to distance in trench between seeds. With carrots its 3-4 per inch. Don’t overseed. It makes thinning later more difficult.
3) Days to Sprout aka Days to Germination refers to the length of time between when a seed is first planted and when it first appears above ground.
4) Spacing after Transplanting or Plant Spacing refers to the distance between plants once all thinning and transplanting has been done.
5) Row Spacing refers to the distance between the rows. In school gardens we use mostly raised beds and not large fields in which these seeds are intended. The distance between rows in a raised bed can usually be greatly reduced.
6) Days Until Harvest aka Days to Maturity is the time it takes to go from seed to table. Some will start from the day the seeds are planted while others use the day the seedling are transplanted to their final position. Notice cauliflower takes 60 days however it is started indoors for 4-6 weeks. If we plant cauliflower directly in the ground our Days until Harvest will be 88-102 days.
7) Misc – The following information is sometimes included but not always: light requirements, soil requirements, irrigation suggestions, when and how to harvest, fertilization requirements, and, growing suggestions.