When to Harvest Rhubarb To be honest, rhubarb is “ripe” all spring and summer. But for the health of the plant, there are certain times that you should make your rhubarb harvest. The best time when to harvest rhubarb is when the stalks of the leaves reach at least 10 inches long.Click to see full answer. Also question is, when should you not pick rhubarb?A good rule of thumb is to pick your rhubarb no later than July 4. The harvesting period typically lasts about 8 to 10 weeks. Rhubarb plants are dormant during the fall and winter. If you try to harvest your rhubarb too late, the stalks might get frost damage and be inedible.Additionally, can you eat rhubarb after it flowers? While the flower or seed stalks should not be used, the leaf stalks are edible. However, the flower stalks should be promptly pulled and discarded. If allowed to develop, the flower stalks reduce plant vigor and next year’s production. Dig and divide large, old rhubarb plants in early spring or late summer. In this way, can I harvest rhubarb in September? Rhubarb is harvested by hand, and ONLY the stalks are edible. In Canada and the United States, the rhubarb season runs from about April to September, although it can also be grown forced. Rhubarb stalks are approximately 10 – 15 inches long when ready to harvest.Can you eat green rhubarb?Surprisingly, it seems some cultivars with the best flavor have less of the prized pink color. The color of any particular rhubarb stalk will depend on both the cultivar, and how it was grown. So yes, green rhubarb is safe to eat, with the same caveats as apply to any rhubarb. Especially, don’t eat the leaves.

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