Citrus gall wasp preventionPublished July 3, 2017 at dimensions 1000 × 244 in Treating Citrus Gall Wasp in Melbourne: An alternative approach to “Prune in June”. ← Previous Next → The general timing of events related to growing citrus in Melbourne. Please note, some of these events may vary slightly for different citrus varieties. This is especially the case for lemons which may have multiple crops per year.