Squash: Patisson Blanc (Custard White) Cucurbita pepo Approx.11-12 seeds per gram Squash has become such a popular vegetable to grow over the last decade or so and for good reason. Butternut is one of the best known but there are so many varieties to choose from. There are summer and winter types. Summer squash are thin-skinned with a lighter, moist flesh. They are best eaten fresh. Winter squash have a harder skin and dense flesh with a more intense flavour. They can be stored for a few months after harvest.