Answer: For shrubs, annuals and perennials, you can amend the planting area with organic matter to help it drain well. The easiest way is to spread 4-5" of compost or aged-manure over the entire planting bed and dig it in to a depth of 8-10", then level the surface and plant.
Your citrus tree will need well draining soil, as well. Most are adaptable, but if your soil simply doesn't drain well you might consider planting your lime tree in a container or in a raised bed. You can mound some amended soil up 2-3' and plant your tree on the mound. This will provide adequate drainage and your lime tree should flourish.
Best wishes with your landscape.
Q&A Library Searching Tips