timing
Days to maturity
Last reviewed 2026-10-04
Days to maturity is the approximate number of days from a stated starting point until a crop reaches the harvest stage described by the seed company or plant source. The starting point may be direct sowing, transplanting, or germination. Because sources use different starting points, the number is useful only when its definition is clear.
What it means
Maturity can mean baby leaf, green fruit, dry seed, market size, or another specified stage. It does not always mean the plant has reached its largest possible size. Read the packet wording and look for notes such as “from transplant” or “from direct sowing.”
How it affects the garden
Temperature, light, water, fertility, variety, and transplant shock can move the actual harvest date earlier or later. Cool weather can slow a warm-season crop, while extreme heat can reduce fruit set. Treat the number as an estimate for planning rather than a countdown that overrides the plant's appearance.
The harvest date calculator can add a maturity estimate to a planting date. For a succession crop, repeat the calculation for each sowing. Check the crop's color, size, texture, and harvest guidance before picking.
Example
A tomato packet listing 70 days from transplant may reach the described ripe stage about 70 days after a healthy transplant under suitable conditions. Counting 70 days from the seed sowing date would use a different starting point and underestimate the total time.
Common confusion
Days to maturity is not the same as germination time. A seed can sprout in five days and still need many more weeks to reach harvest. It is also not a guaranteed date.
Sources
University of Minnesota Extension's seed starting guidance explains why crop timing depends on the starting method and local conditions.
