Beans in my sub irrigated planter on the deck outside our kitchen are coming in good.
Question for anyone more experienced than me... This is a sub irrigated planter, meaning that there is about a 3 inch reservoir of water in the bottom of the box, and the theory is that the soil will soak up the water for the plants as needed. You can see in this following picture that I have a water level float cut from a swimming noodle to indicate the level of the water in the reservoir below. Currently, there is at least 2 inches of water in the box.
In theory, you don't need to top water your plants. However, it is my understanding that when you plant the seeds, you need to keep the top soil moist for the seeds to germinate. So, during the period of germination, I top water the planter every other day. You can see that the plants are shooting up.
I just replanted bean seeds in the spaces where the previous planting of seeds did not take. I use the square foot gardening spacing of 9 bean plants per square foot. My plan has been to plant the seeds, see what grows in 2 weeks, and then replant new seeds where nothing came up. I'll check again in another 2 weeks and replant again, if needed, in any empty space. My theory is that having different bean plants growing at different stages will extend the harvest season. Is that right? Or will the older plants just prevent the younger plants from growing?
FWIW, this sub irrigated planter (SIP) has become my favorite way to grow beans. Once the plants are established, I stop top watering the plants and they just send their roots down towards the bottom where the water reservoir is. I think last summer I only had to refill the planter 3 times. Very low maintenance.