Is fall the best time to take soil samples? Many growers take soil samples in the fall after their crops are off. It’s a good time to sample for several reasons. In fall, it’s convenient to drive the fields and pull samples when there isn’t anything growing to get in the way, and soils tend to be drier. Fall also tends to be less busy than spring, giving more time for sampling. Knowing your soil nutrient levels in fall gives you time to put on a …