Is A San Marzano Tomato Determinate Or Indeterminate? It’s an indeterminate tomato with a longer season than some other paste tomatoes. The determinate tomatoes were gifted in 1989’s Siberia by a man called Sasha. Their seeds are available for purchase. The advantage to determinate tomato plants is that they require less work and tend to have more resistance to disease. San Marzano. San Marzano is a variety of plum tomato, with thinner, elongated and more pointed, meaty fruits than Roma tomatoes. They resist Fusarium Wilt Race 1 and Alternaria Stem Canker. This delicious paste tomato is an heirloom variety that originates from a small town near Naples, Italy. Many paste and Roma tomatoes, such as ‘San Marzano’ and ‘Amish Paste’, are determinate varieties. Indeterminate tomato plants grow tall and vine-like with lots of side shoots, although they do not have tendrils to grab onto supports. Determinate tomato plants are often referred to as “bush” tomatoes. Hybrid determinate varieties are also available. Determinate San Marzano plant supported by a 4-foot tall, square, steel cage. Others have been bred to be determinate so that they can be harvested in quantity all at … San Marzano Tomatoes - How to Grow and Care for San Marzanos. Sasha Altai. The red determinate tomatoes reach 10oz per fruit. The semi-determinate tomatoes take 85 days to mature. San Marzano's taste is stronger, sweeter and less acidic, considered by many people to …