garden soil

Two West Coast questions

Hi guys!

I live in Melkbosstrand (Western Cape, West Coast) and we have a real problem with hydrophobic soil. How does one rectify this cost-effectively and safely? Also, I want to plant some plants that are indigenous to the West Coast where I live and that are drought resistant. Do you have any ideas? How should I prepare my hydrophobic soil for these plants?

Thanks very much!