On 20 September, John Arnott - Horticulturist, was joined by Julian Blackhirst - Head of Gardens at The Diggers Club; Tim Uebergang - Team Leader Horticulture & Cycad Curator, Melbourne Gardens RBGV; and Lubana Squire - Horticulturist.

Text your gardening questions to 0488 809 855, or call 9419 0155 while we're on the air.

Tune in 7:30 - 9:15am Sundays on 855 on the AM dial, 3CR Digital or stream at 3cr.org.au

Sunday morning sleep-innerers can catch up on past episodes at 3cr.org.au/gardening or via a podcast app.