I think it means from the time you sow the seeds. In the case of your radishes for example, about 4 or 5 days for the seeds to sprout and another 20 days till harvest time.

Art

Yes, for items that are normally directed seeded (as are radishes, corn, lettuce, squash,etc.) it is # of days from planting the seeds. For those items that are normally grown from transplant (tomato, pepper, etc.) it is the # of day from transplanting.

However it is important to remember that DTM (days to maturity) are just a general guide, an "average", as many variables can affect it.

Dave

Dave, that makes sense. Just out of idle curiosity I will try to "time" my cuces, tomatoes and few others this season. I think my radishes are behind the schedule :) But we've had a cool spring so far so that might be their excuse.