Horticulture & Gardening Vocabulary in English

An annual plant completes its entire life cycle — germination, growth, flowering, seeding, and death — within one growing season. It must be replanted each year from seed. A perennial plant lives for more than two years, typically dying back above ground in winter and regrowing from roots or underground storage organs in spring. Sunflowers and nasturtiums are annuals; hostas and geraniums are perennials. Some tender perennials are treated as annuals in colder climates.

Propagation is the process of creating new plants from existing ones. Methods include growing from seed, taking stem or leaf cuttings, layering (bending a stem to the ground and letting it root), dividing established clumps, and grafting (joining two plant parts). Each method suits different plant types and purposes. Propagation allows gardeners and nurseries to produce large numbers of plants economically and to preserve desirable varieties.

Compost is decomposed organic matter — kitchen scraps, leaves, grass clippings — that improves soil structure, increases beneficial microbial activity, improves drainage and water retention, and releases nutrients slowly over time. Fertiliser provides specific nutrients — typically nitrogen (N), phosphorus (P), and potassium (K) — in concentrated form that plants can absorb quickly. Compost improves soil health in the long term; fertiliser provides targeted nutritional support. Good gardens use both.

pH measures how acidic or alkaline the soil is on a scale from 0 (most acidic) to 14 (most alkaline), with 7 being neutral. Most vegetables and garden plants prefer a slightly acidic to neutral pH of 6.0–7.0. Blueberries, rhododendrons, and azaleas need acidic soil at pH 4.5–5.5. Lavender and many Mediterranean plants prefer alkaline conditions. Testing soil pH with a kit is quick and inexpensive, and adjusting it prevents nutrient deficiencies.

Grafting joins two different plant parts — the rootstock (which provides vigour and roots) and the scion (which provides the desired fruit, flower, or form) — so they grow together as one plant. It is used for fruit trees, roses, and tomatoes to combine the best traits of two varieties. Taking cuttings simply roots a piece of stem or leaf in compost to produce a genetically identical new plant. Grafting is more complex but allows greater control over the resulting plant's characteristics.

A cultivar (cultivated variety) is a plant that has been deliberately bred or selected for specific desirable traits — disease resistance, flower colour, fruit size, compact growth habit — and is maintained through cultivation. A species is a natural, wild form shaped by evolution. For example, Rosa canina (dog rose) is a wild species; ‘Queen Elizabeth’ is a cultivar bred for large pink blooms and disease resistance. Cultivar names are written in single quotation marks after the Latin name.

Dormancy is a period of reduced metabolic activity during which a plant temporarily stops growing, usually in response to cold temperatures or drought. Deciduous trees lose their leaves and enter dormancy in winter, conserving energy until spring. Bulbs such as tulips and daffodils spend summer dormant underground. Dormancy allows plants to survive unfavourable conditions and resume vigorous growth when conditions improve. It should not be confused with death — dormant plants are alive and resting.

Companion planting is the practice of growing different species close together because they benefit each other. Classic examples: marigolds deter aphids from tomatoes; legumes (beans, peas) fix nitrogen that feeds neighbouring plants; basil is thought to improve the flavour of and deter pests from nearby tomatoes. Companion planting reduces the need for pesticides and can improve yields. The science behind some traditional pairings is stronger than others, but the approach is widely used in organic and no-dig growing.

Garden, environment, and agriculture topics appear in IELTS General Training Reading — often as instructions, guides, or informational texts about growing plants or managing land — and in Cambridge B1 and B2 reading texts. Words like harvest, irrigation, fertiliser, and seasonal are commonly encountered in exam contexts. Understanding the vocabulary also supports reading about environmental topics such as biodiversity and sustainable land use.

Use Flash Cards to memorise pairs like annual/perennial and compost/fertiliser. Wordsearch reinforces spelling of longer words like propagation and companion planting. The Royal Horticultural Society (RHS) website and UK gardening magazines such as Gardeners' World use all of this vocabulary in accessible, real-world English and are excellent free resources for B1–B2 reading practice.