beth

Dave's Garden has it listed as a mid- to late-maturing variety, 69-80 days. It probably falls somewhere in the middle of that range, and it would depend on when you set the plants out as well as how mature the plants themselves are when you do. Those days are estimates anyway, since a lot of factors come into play about maturation dates.

I'm planning to grow New Big Dwarf for the first time this upcoming summer, too, in an effort to find some shorter tomatoes that are just as tasty as many of the indeterminate varieties, which are huge in my garden by mid-July, even when trellised!

Here is a link that might be useful: New Big Dwarf

This is a copy of a 1914 advertisement.

Days to maturity are highly variable as to season, age of transplant, etc - for me, New Big Dwarf came in at 64 days from transplant last season. I would classify it as a midseason variety, typically.