thanks and yeah I had some failures over the years, they key is to start with a full tire of dirt as soon as the bottom tire is planted. not to let the tops of the plant break the surface, because once they do they go up like weeds and it doesn't work ill scrap down and when the shoot is a couple inches from the top on goes another tire and foot of dirt. I suppose stagger planting another seeder would probably work as well but I haven't tried it.