Ground Ivy just appearing at the moment
????
I've patches of my wood where there's nothing else on the ground, all year. Try 90% dense Oak cover, and I'll guarantee you'll not be short of ground Ivy, in our wood its like a shag pile carpet!! It seems to be a competition between the bluebells, ivy and brambles, depending on light. Where the oak is thinned, there's an explosion of numerous herbaceous new growth, and the Ivy disappears. Light and thinning seems a good way to go towards biodiversity. I take ground Ivy as an indicator of thinning required, unless you like gloom and 'dark woods'.