Flowers guide
Flowers start every shop loop.
Plant flowers, wait for them to grow, then harvest them for direct sales or crafting. The official game description also says flowers grow while you are offline.

The confirmed flow
Planting leads to two next decisions.
After harvesting, decide whether a flower stays as sale stock or becomes part of an arrangement.
Plant and grow
Use the price and timer shown in the current seed list. When this page adds a value table, each number will keep its source date and game build so you can spot an outdated entry.
Harvest and route the stock
Harvested flowers can feed customer sales or the bouquet and arrangement system described by the game.
Offline progress
Your beds can keep growing between sessions.
Offline growth is part of the official description. The description does not state a multiplier, cap, or exact timing rule.
Check the growth state shown after you rejoin. Do not plan around a fixed offline rate unless the current game interface gives you one.