Oaks, like 80% of the higher plant species, have an incredible symbiotic relationship with fungi, through their roots. The miccorrhizae of fungi are better than roots at extracting moisture and nutrients from the ground and can even penetrate hard rock to extract phosphates. They can also store these nutrients for when the tree needs them. The fungi also produce hormones which help tree roots develop, and others which protect them from damage. The fungi itself gains nutrients from the tree roots, enabling it to create vast networks beneath the soil. A recent study under a small oak calculated that the fungal micorrhizae just for that tree would reach round the world! The fungi also enable the tree to transport carbon to its seedlings, and another study shows that trees can detect and favour their own seedlings over the seedlings of others of the same species! Conditions: Grey days, with some rain. Temperature: Max 13- Min 6c.