After reading Diana Walsted's book, I am wondering if the Vall is being
killed by dwarf Saggitaria. What is happening is that the Vall which always
was healthy began to uproot after the Saggitaria began taking over. The
Vall roots are brown, short and look rooted. Diana devoted a lot of her
book on plant allelapathy (sp?) where one plant specie in order to survive
can produce poisonous chemicals that kill other invasive plants. Im am
looking for any readers who may have experienced similar results between
Vall and Saggitaria.