Why is my rhubarb flowering?
Flower development is natural for rhubarb and most other plants. Drought, extreme heat, and infertile soils may encourage flowering. Age is another factor. Old plants tend to flower more than younger ones.
Regardless of the reason, flower stalks should be promptly pulled and discarded. Plants will be less productive if allowed to flower and set seeds.
Flower formation can be discouraged with good cultural practices. Water rhubarb plants every 7 to 10 days during dry weather. Sprinkle ½ cup of an all-purpose garden fertilizer, such as 10-10-10, around each plant in early spring. Control weeds by shallow hoeing, hand pulling, or mulching.