RHS Empathy After Plant Evergreen Empathy AFTER PLANT EVERGREEN is ideal for Buxus (box), Bay trees, Camelias, Yew, Conifers and all types of evergreen hedging or garden plants. Plants in the Ground: Apply 1-2 handfuls (25 – 50g) around the base of the plant, lightly worked into the soil and water well. for larger established plants apply 2 handfuls per square meter under the canopy of the plant. For box hedging use 1 good handful for every one meter. Container plants and topiary: Apply 2 – 3 handfuls per plant twice yearly. We recommend that once per year 5 – 10cm (2-4inches) of soil are removed from the top of the pot and replaced with fresh compost. Add 1 – 2 handfuls when replacing the compost to keep your evergreens in prime condition. Empathy AFTER PLANT EVERGREEN is NOT a substitute for using rootgrow™ at time of planting. For new plantings, or in poor soil conditions, we recommend using pure rootgrow™ mycorrhizal fungi applied close to the plant’s roots.How does Rootgrow work?Rootgrow mycorrhizal fungi bond to a plant’s roots, effectively becoming part of its root system. They grow rapidly in search of water and nutrients, and as they're finer than the plant's coarse roots, they’re better at reaching them - helping plants thrive in even difficult soils.In poor sandy soil, they track down scarce nutrients and water, and in dense clay soil they unlock nutrients, acting like a clay breaker. They're great at hunting down phosphorus and potassium for flowering and fruiting, but also thrive on finding trace elements. And they hold onto water like a sponge, giving your plants far better drought tolerance.