Lack of sun and lack of water in the midsummer heat are two of the main reasons why figs on mature trees don’t ripen.

Figs have really shallow root systems and so are susceptible to water stress. Mulching can help to keep the soil moisture level more even.

Figs also may not ripen due to insufficient late summer heat. A really wet June, followed by a very hot dry July (did it get enough water in July?) and then a fairly cool August can result in unripened fruit. 

Other reasons for failure to ripen are lack of potassium and phosphorus or too much nitrogen. Is your tree sitting next to a lawn that is frequently fertilized? Nitrogen from the lawn may be leaching into the soil around the tree.

For tips on a variety of gardening topics, see our Plant Information Guides.
- Courtesy of NYBG Plant Information Service