Question: My Carolina jessamine isn’t as dark green as it used to be. What will get it better looking?
Answer: Several things done in unison will help. First, apply iron and a sulfur soil-acidifier during the growing season, especially if your soils are highly alkaline. Nitrogen usually will also help, in fact, it seems that the plants utilize the iron better once you have applied nitrogen. Make sure you’re watering it regularly. Extremes of winter weather can also leave part or all of a Carolina jessamine plant yellowed and weak, in which case you’ll need to prune out the dead wood and encourage regrowth.