Determinate. San Marzano Paste Tomato proudly maintains characteristics of the perfect paste, puree or canning tomato. San Marzano matures in clusters, holds well on the vine and in storage, is crack resistant, and processes well due to its solid nature. For these reasons, San Marzano Tomatoes remain Italy's top choice as the perfect canning tomato. Harvest in about 80 days. David’s Garden Seeds is a Veteran owned business that has been offering quality seeds since 2009.