Plant Blue Lake Bush Beans in the early Summer. These beans like plenty of room to grow, so make sure to give them their space. Sow one inch deep and six inches apart in a row or grid fashion. Water beans with one inch of water per week and add organic mulch or compost after the seedlings emerge to retain moisture — your plants will reward you with continuous, highly productive yields throughout the growing season. Your Blue Lake Bush Beans are ready to eat when they are about six inches long. Beans will snap in half with ease when ripe.