Early Girl is a cultivar of tomato with indeterminate growth, which means it produces flowers and fruit until it is killed by frost or another external factor (contrast with a determinate cultivar, which would grow to a limited, predefined shape and be most productive for one large harvest before dying or tapering off with minimal new growth or fruit).

Fruit maturity ranges from 50 to 62 days (1.6 to 2.0 mo) after transplanting, depending on the source, which appeals to growers in climates with shorter growing seasons.

[3] Since 2005, Monsanto Company is the primary producer of Early Girl seeds after acquiring Seminis corporation and its patent on the hybrid.

[8][9][10] Dry-farmed Early Girl tomatoes are popular at farmers' markets in the San Francisco Bay Area.

Early Girl is also popular with home gardeners in that region, where it thrives, unlike many tomato varieties, despite the area's cool and often overcast summers.