When the pinelands are shallowly flooded.
|The bar chart above shows the annual duration that the water table has risen up into the hydric (orange) and mesic (red) pinelands of Big Cypress National Preserve. This year the pinelands (so far) have yet to get wet.|
The problem is that's yet to happen this year.
Usually we can count on the hydric pines going under for a good three months of the summer/fall period and the higher-perched mesic pines getting wet at their feet for a few weeks at least.
Remember: It's not just depth, but duration of flooding, that matters most.