Days to maturity: sowing or transplanting?

Find the event that starts the count

A packet may count from sowing or from setting out a transplant. The starting point can differ between crops and suppliers. Johnny’s Chinese cabbage guidance, for example, counts from transplanting and gives a separate adjustment for direct seeding. Its kale guidance counts from direct seeding. Do not apply one crop’s adjustment to another.

1. Read the packet and the supplier’s full growing instructions.
2. Write down both the maturity number and its starting event.
3. Match that event to the sowing or transplanting date in your plan.

Keep time in the nursery separate

For a transplant-to-maturity figure, the weeks spent raising a seedling come before the stated count. A 60-day transplant crop does not become ready 60 days after you sow it indoors. Use the seed-starting calendar for nursery timing, then check the packet again for the harvest estimate.

Use the same basis in your calculation

Suppose your packet says 55 days from transplanting. With an October 15 frost reference and a 14-day allowance, the fall calculator gives August 7 as the latest transplant reference. Indoor sowing has to happen earlier. If the packet instead says 55 days from sowing, August 7 refers to sowing. The arithmetic is identical; the event is different.

Match the harvest you want

Check whether the figure describes baby leaves, a full head, roots or another harvest stage. A shorter figure for baby greens cannot stand in for a full-size harvest. Record the variety and stage in your plan notes so that the number still makes sense when you return to it.

Leave room for autumn growth

Maryland Extension adds a two-week short-day allowance to its fall calculation. The calculator starts at 14 days and lets you change it. That regional rule does not model every latitude, variety or season. Check local guidance and observed conditions; a result before the frost reference still does not promise a harvest.