Summarize:

It is essential to keep the soil evenly moist, so keep a close eye on your plants in the summer for signs of withering, yellowing, or dry soil. For best results, water your plants in the morning. Be careful not to overwater the plants, as they are susceptible to root rot. To avoid this, you can plant rhubarb on a hillside or on raised beds. Because a rhubarb crop can take several years to become established, you might want to grow a couple of plants from a crown while your seeds grow, mature, and become harvestable. Areas that grow rhubarb annually tend to have severely hot summer temperatures. Make sure to harvest your rhubarb in the late spring before the heat has a chance to kill the crop.
Water your plants regularly. Consider growing rhubarb from a crown while you wait. Harvest your annual rhubarb between March and May.