You can place prepared material at the curb starting at 7 a.m. the day before your scheduled pickup. Make sure your items are out no later than 6 a.m. on your collection day.
If your items are not collected for any reason, they must be removed from the curb within two days following the completed pickup in your area. If your collection was missed, make sure you report it promptly and no later than 48 hours after your scheduled pickup.
These times are set by city ordinance so make sure you follow them- items placed at the curb too early or left out too late are considered a nuisance and may result in enforcement action without notice.