Bushy Olive Tree - Nursery PotOlive Tree Quick Care Guide Light & Water Prefers full sun for at least 6 hours a day. Water when the top 2 3 cm of soil is dry; avoid overwatering. Humidity Tolerates low to moderate humidity; avoid high humidity to prevent fungal issues. Maintenance Fertilize every 2 3 months during the growing season, prune for shape and to remove dead branches, and repot every 2 3 years.