How to get rid of water in clay soil

[Kevin92]

Planted a few trees in the backyard. A week into it the plants were dying. Uprooted all of them and realized that the soil and roots were soaked with water. Clearly there was too much water. Now I can see the holes getting filled up with water during the rain and its not draining at all. The soil is clay too. Any ideas to get the water to drain? 

I was thinking of installing some Agi pipes right next to them and drain it towards the other side. Any advice is greatly appreciated.

Thank you

[EricL]

Hello @Jewelleryrescue

Thank you so much for sharing your recommendations for @Kevin92's garden. I'm sure they'll find your added suggestions helpful.

Eric