can you tell me when I should water them or how you would do it?
For the larger plant… Don’t water again until the pots feel a bit lighter.
Water before soil becomes too dry/top soil changes color and look for plant queues like…
(leaves not as perky/feeling dry like paper, branches losing their rigid full of water feeling, wispy structure)
Water until you get a small amount of runoff.
For the little plants… just keep the soil moist, but not saturated. Don’t let them dry out! Avoid watering to get runoff, just consistent moisture until they start drying out the pots (drinking) between your waterings. Then you can start watering heavier until or close to saturation.
When the plants start drinking that down quickly, it’s probably time for a transplant to a larger container.
How to water soil :
slow and evenly distributed
by hand, sprayer or dripper.
I’m attaching a link that helped me to understand the soil/plant/water relationship much better.
The basic concepts and benefits of soil water content and soil water thresholds for efficient irrigating practices.
extension.okstate.edu
Hope this helps