Seasonally produced biomass such as sugar beet pulp (SBP) and tomato pomace (TP) must be stored properly to meet the demand of year-round biofuel production. Ensilage was studied to preserve SBP and TP from degradation of energy components. The moisture content (MC) of the feedstock is a critical factor affecting the performance of ensilage as well as the cost of feedstock storage and transportation. Two lactic acid bacteria (LAB) strains, including Lactobacillus brevis B-1836 and Lactobacillus fermentum NRRL B-4524 were used for SBP ensilage. The raw SBP as received (80% MC) and air-dried (10% MC) were run as controls. The other tested MCs of SBP were 80%, 55%, and 30%. A TP-isolate denoted UTP 4 and a TP-extract containing naturally occurring microorganisms were used to ensile TP. Five different MC levels, including a raw control (60% as received), air-dried control (10% MC), 60%, 45%, and 30% were investigated. Except for the controls, all other tested MCs were achieved by air drying followed by rehydration. For both SBP and TP, the ensilage of the raw control was competitive with ensilage with LAB inoculations tested at the as-received MC.  The 10% MC treatment did not exhibit any change during ensilage; indicating drying the biomass can effectively stabilize SBP and TP during storage. The ensilage was significantly improved as the MC decreased from 80% to 30% for SBP and from 60% to 30% for TP. Our results suggest that partial drying followed by ensiling may be a good approach for biomass stabilization.