Thank you nick615 but unfortunately I have already filled the planter so no chance of following your good advice. I took 720litres of compost plus half the contents of my composter and a wheelbarrow full of garden soil to fill it so I definitely won't be emptying it! I will however keep an eye on the legs and watch for any pooling.
the legs will last the longest from my experience as long as standing on stone but as has been pointed out treated timber doesn't necessarily last that long but saying that I build one out of recycled shed wood, lined it with plastic and still standing after 5 years. Even if the wooden slats rot they will still offer support. Whats done is done.
Holes would have prevented excess pooling and add ventilation from the bottom which would extend the wood, painting the holes the water would drip out of with some water repellent paint would have added some more protection.
a Plastic liner is a must imo. All plastic pots have plastic at the bottom so no different to a plastic pot but it is thick wood which will take atleast 5 years to rot and probably still last several years after before it collapses.
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Even if the wooden slats rot they will still offer support. Whats done is done.
Holes would have prevented excess pooling and add ventilation from the bottom which would extend the wood, painting the holes the water would drip out of with some water repellent paint would have added some more protection.
a Plastic liner is a must imo. All plastic pots have plastic at the bottom so no different to a plastic pot but it is thick wood which will take atleast 5 years to rot and probably still last several years after before it collapses.