It's so simple to do! I like the very heavy strong rattan baskets. If you find your basket at an Op shop, curbside garbage pile or the back of your cupboard, there’s a good chance that you’ll want to update the style of it a little bit before you put it on display. Some of the softer cane baskets can be finished with 2 coats of a protectant clear coat spray paint to protect the finish when I put my basket planter outside. Painting and clear-coating your basket will also help it to last a little longer. Personally, with the rattan baskets (which are pretty heavy) I leave them alone. They weather beautifully, and like any natural fibre, eventually, it will break down but you should get quite a few seasons out of it if you use the strong rattan type.
This stops soil from falling through to the outside and also the roots from travelling out of the basket.
You can use a sheet of thick plastic perforated with holes at the bottom for drainage, personally I like to keep plastic out fo my planter pots unless UV stabilised and food grade. You can use a geo-textile for garden use or even an old piece of cotton such as a pillow slip. I use coco coir basket liners.
A general potting mix is good for flowers and a Herb and Veggie mix is suitable for potted herbs
There are endless opportunities for what can be planted in a basket. Ornamentals, annual flowers, Spring bulbs , herbs and vegetables can all be grown in this way.
Then why not use the out of the bag solution - the Root Pouch grow bags which are food safe, BPA free and made of 100% recycled PET water bottles! Will not fall apart after a few seasons and are attractive and functional.
See how Larry & Eyvonne Hall grow a huge array of edibles in their Root Pouch bags!