The Effect of Light Intensity on Bean Plants

Light Requirements

• To grow beans successfully, ensure the plants get 10 1/2 to 12 1/2 weeks of full sunlight prior to harvesting. This includes three to eight days for germination for seedlings to develop. After that, they can be transplanted into their permanent garden until the beans are ready to be picked. Even though sunlight is the major source of light intensity for most plants, artificial lighting and greenhouses can provide or supplement the amount of light needed for bean plants.

Effects of Low Light Intensity

• A common problem associated with container gardening is insufficient light. If beans do not get adequate sunlight in the initial stages of growth, they can become unproductive and look very tall and weed-like. If the container sits in a cold spot, symptoms may appear such as stunted growth, purple color and unhealthy appearance. In some cases, cold spots can be an indirect result of inadequate sun. Growth is slowed down and the germination process may be stalled due to inadequate light. When this happens, bacteria in the form of mold can grow.

Prevention/Solution

• There are some easy ways to correct many issues relating to insufficient light, including cold spots and mold. Move containers to sunlit areas to increase the amount of required light. Place plant boxes in front of a window during sunnier times of the day. Repeat as needed until the beans sprout into seedlings and are ready to be transplanted into the ground. Catch any problems in the early stages by checking your bean plants daily.

Considerations

• Plant the seeds about 1 inch apart from one another in medium-size containers. Keep the soil moist, but do not over-water. When your bean plants are ready to be transplanted outdoors, consider placing them in a raised flower bed. This way, you maintain control of the special bean environment, as it is separate from other areas in the yard that may require different care needs.

Warning

• Before transplanting your bean plants outdoors, take note of where they will benefit from the most sunlight during the day. They will still have about 10 more weeks ahead of them prior to harvesting. Get rid of pests by using organic pest control products. Organic compost is beneficial to beans during the maintenance and continued growth phase. Use it regularly, mixing it into the soil. Always check package directions before growing bean plants. Different varieties may have special recommendations in order to enhance their growth.