Weld (Reseda luteoma), also known as dyer’s rocket, produces dense rosettes of slender, rich green leaves and upright stems tipped with spikes of small yellow flowers through the summer. Here at Hayefield, the plants usually reach 1 to 3 feet tall in bloom, but I’ve read that they can reach to 5 feet tall. Weld may behave like an annual, flowering the first summer and then dying, or like a biennial, forming only the leafy rosette the first year and flowering the second year. (From one sowing, I had some plants be annual and some biennial.) Some descriptions say that weld is fragrant, but I have never been able to detect any scent. The plants have some ornamental interest, but the main reason you’d grow weld is for the rich yellow dye it can produce. If you allow the seeds to mature on the plant, weld is quite likely to self-sow.