Breaking bud: the stage of growth when a bud bursts through the protective bud scales.
Broadcast sowing: scattering seeds evenly over the ground rather than in furrows or drills.
Contact weedkiller: a weedkiller that kills by direct contact.
Deciduous: describes plants that shed leaves at the end of the growing season and renew them at the beginning of the next.
Drill: a narrow, straight furrow in the soil in which seeds are sown or seedlings planted.
Evergreen: describes plants that retain most of their leaves throughout the year.
Foliage: leaves.
Germination: the physical and chemical changes that take place as a seed starts to grow and develop into a plant.
Hardy: able to withstand year-round climatic conditions including frost, without protection.
Medium: a growing mixture or other material in which plants may be grown.
Organic matter: composts or similar materials derived from plant material.
Perennial: any plant living for at least three years. Annual plants live for one year, biennial plants for two.
Rootball: the roots and accompanying soil when a plant is removed from a container or lifted from the ground.
Rosette: a cluster of leaves radiating from approximately the same point, often at ground level.
Seedling: a young plant that has developed from a seed.
Systemic or translocated weedkiller: a weedkiller absorbed and distributed through a plant when applied to leaves.
Tilth: a fine crumbly surface layer of soil produced by cultivation.
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