Answer: Based on your description this is a case of blossom end rot. Usually it happens when soil moisture levels are uneven -- dry then wet then dry again. Try to keep the soil slightly moist like a wrung out sponge, never saturated and never dried out. A slow, deep watering every 5 to 7 days (if it doesn't rain) should help, along with using an organic mulch over the root area. To know if you need to water, dig into the soil with your finger. If it is still damp, do not water yet. Also, avoid overfertilizing as this can cause extra fast growth that makes the plants more susceptible to it.
Q&A Library Searching Tips