A perfect combination of nitrogen and potash. For use in container grown or garden variety tomatoes. For combination feedings use with liquid seaweed. Ripens tomatoes earlier, increases production and quantity giving you the best tomatoes you have ever grown. Fertilizer guru Pete Small says apply when transplanting and then every 10 days when flowers first appear. This combo has made a real believer of giant Tomato growers including Guy Lacroix of Portage la Prairie, MB.