Sandy soil is both poor in nutrients and cannot retain moisture. Some vegetables and heath plants grow well in it, though. Amending it takes time.
4 Key Soil Types: Advantages and Disadvantages
Improving Sandy Soil: Amending It Right - Epic Gardening
Healthy Soil and How to Make It
How to Improve Clay Soil in 6 Steps - Tenth Acre Farm
Organic Garden Soil: Use Organic Compost +more
How to garden on sandy soil
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Gardening in Sandy Soils
Plants and vegetables for sandy soil - amend sand to make it richer
Plants and vegetables for sandy soil - amend sand to make it richer
Improving Sandy Soil: Amending It Right - Epic Gardening
How To Improve Different Types Of Soil For Planting - Wilson Bros
How to Garden With Sandy Soil - While Improving it Year over Year
How to Prepare Soil for a Garden - The Home Depot