Spring Field Peas OG grow 3-4′ tall, smothering weeds more effectively than clover planted in spring. 4010 Spring Field Peas yield large amounts of biomass and can fix over 100 lbs of Nitrogen/acre. Plant them solo or mix with small grains like spring oats for optimal nutrition. Their tendrils add interesting color to salads, while dried yellow peas can add protein to soups.