Breaking a Starapple drops a starapple seed.

Breaking a and plant has a chance of dropping that plant's seed.

Interact with plants to attempt to gather seeds without destroying the plant if you have the Harvestry skill.

Interact with a seed on the ground to plant it.

Pour fresh water on a planted seed to water it.

Check back in on it to make sure it doesn't dry out.

Rock walls now drop large stone some time.

Interact with a pile of 10 large stone to build a pile of rubble.

Interact with a pile of rubble on the ground to build a mortared stone wall.

Interact with a pile of 10 bent metal sheets to build a door.