The effects of root-zone temperature and limestone on root-zone medium pH and electrical conductivity on New Guinea impatiens 'Celebration Orange'
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The purpose of this experiment was to examine the effects of various media temperatures and pH on nutrient availability for New Guinea impatiens (Impatiens x hawkeri Bull.). It is important for greenhouse growers to be cognizant of the root-zone medium pH, as New Guinea impatiens are sensitive to nutrient toxicities at low pH. It is thought that limestone at low root-zone medium temperatures is not quickly activated leading to these toxicities. The objectives of this project were to determine: The effect of root-zone medium pH on foliar symptoms of iron and manganese toxicity; and the effect ...