My top tip to keep a continuous level of moisture going in throughout the day, is to sink an upside down plastic bottle into the centre of the basket. Simply poke holes into the lid and it will drip feed water throughout the day.
As the container’s limited resources are not capable of replenishing the plant, fruiting crops needs to be given a little help. This is particularly where fertilisers are so important.
A soil-based compost, like John Innes No 3, will offer an ideal growing medium as it gives the roots sufficient room to grow whilst being nutrient-rich for fruiting plants. This soil will also help to add stability to the pot.