Objective: Grow an herb garden if you have no actual soil.

Which of the following solutions is more sound in terms of naive physics reasoning?

OPT: --Herbs grow really well in pots which can be placed near a window. Just start from seed, they grow extremely well with little care needed. Just keep the soil in the pot damp. Test the soil with your finger, if it's damp at 2 inches down, you don't need to water yet.. --Herbs grow really well in pots which can be placed near a window. Just start from seed, they grow extremely well but care is needed. Just keep the soil in the pot very nearly dry. Test the soil with you finger, if it's dry at 2 inches down, you don't need to water yet..
Herbs grow really well in pots which can be placed near a window. Just start from seed, they grow extremely well with little care needed. Just keep the soil in the pot damp. Test the soil with your finger, if it's damp at 2 inches down, you don't need to water yet.