Aquasorb isn't expensive and you only need a little. It also lasts for years. Don't use too much and don't reapply every year - when it swells it can actually push a plant right out of the ground if you overdo it.
Rubbermaid containers are great though we found they break down after 3-4 years outside. In the ground is more discreet and will go longer between watering, though if you visit twice a month, you're fine either way. If you go with containers, make sure you poke holes in the bottom.
Rubbermaid containers are great though we found they break down after 3-4 years outside. In the ground is more discreet and will go longer between watering, though if you visit twice a month, you're fine either way. If you go with containers, make sure you poke holes in the bottom.