Does the Druid’s Grove spell create it’s own trees to animate?

@JeremyECrawford Does the Druid's Grove spell in Xanathar's Guide To Everything create it's own trees to animate, or only animate trees if they are already present?

— Tony Musser (@Tony_Musser) November 28, 2017

The druid grove spell animates up to four trees in its area. It doesn't create trees. #DnD https://t.co/O4x5s7XLly

— Jeremy Crawford (@JeremyECrawford) November 29, 2017