Hicks Yew Hedges grow best if they are fertilized lightly in the spring once frost has passed with a well-balanced, extended-release fertilizer, such as Espoma Tree-Tone or Espoma Holly-Tone to provide the extra acid that junipers crave. Fertilize these hedges again in late summer to mid-fall.We do not recommend fertilizing this type of hedge after August. Fall is the time for junipers to begin preparing for dormancy. Fertilizing at this time may stimulate new growth that will be too tender to withstand the winter.