Potash, an important plant food.
Pruning, removing parts of a plant for the good of what remains.
Retentive, holding, retaining, said of soil which holds water.
Reverted, said of phosphoric acid in the process of becoming insoluble.
Rotation of crops, a change of crops in regular order.
Sap, the juice or liquid contents of plants.
Seed bed, the earth in which seeds are sown.
Seedling, a young plant just from the seed. Also a plant raised from a seed in distinction from one produced from a graft or a cutting.
Sepal, one of the parts of the calyx.
Slip, a cutting placed in water or moist soil or other substance to produce roots and form a new plant.