uhm, what i didnt get - it said "harvest them when they are ready", so is it like a portal in a map that opens, and behind this portal is the garden, where i plant some seeds and then wait 10 minutes until they are ready, or what?
When you click on the seed cache it counts as one growth cycle. You don't need to enter your garden to grow the plants, just to plant or harvest them. It's not tied to the passage of time and your plants won't wither if you don't Harvest them.