Rocky soils are usually very low in plant nutrients and have limited moisture retention.
Rocky soils would benefit from the application of a compost like Azwood® Flourish® compost, trusted by many Kiwi growers.
Flourish has a mushroom-compost base which promotes beneficial microbial activity in the soil. It contains animal manures to provide a rich source of nutrients, screened bark fines to help stabilise pH levels and added carbon content.
This all combines to create a perfect environment for root generation and ongoing plant growth.