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Carbohydrates (CHOs) produced through photosynthesis are stored in alfalfa roots and crowns to help develop cold hardiness and survive winter temperatures. In the spring the stored energy is used to initiate growth after dormancy and continued growth after each cutting. The use of stored CHOs slows when plants reach 6 to 8 inches in height because the plants can produce CHOs during photosynthesis. At this stage, more energy is produced and stored in the roots and crowns than used for growth. Storing CHOs continues and reaches their highest level at about full flower (Figure 1).