Horticulture Cheat Sheet

The core ideas of Horticulture distilled into a single, scannable reference — perfect for review or quick lookup.

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Quick Reference

Plant Propagation

The process of creating new plants from seeds, cuttings, grafting, layering, division, or tissue culture. Propagation methods are chosen based on the species, desired genetic uniformity, and production scale.

Photosynthesis and Light Management

The process by which plants convert light energy, carbon dioxide, and water into glucose and oxygen. Understanding light intensity, photoperiod, and spectrum is essential for optimizing plant growth in both field and controlled environments.

Soil Health and Fertility

The physical, chemical, and biological properties of soil that support plant growth, including texture, structure, pH, organic matter content, cation exchange capacity, and microbial activity.

Integrated Pest Management (IPM)

A systematic approach to pest control that combines biological, cultural, mechanical, and chemical methods to minimize pest damage while reducing reliance on synthetic pesticides and protecting beneficial organisms.

Grafting

A horticultural technique in which tissues from one plant (the scion) are joined to the rootstock of another so that they grow together as a single organism. Grafting combines the desirable fruiting or flowering qualities of the scion with the root vigor, disease resistance, or dwarfing characteristics of the rootstock.

Controlled-Environment Agriculture (CEA)

The cultivation of plants within enclosed structures such as greenhouses, high tunnels, or vertical farms where environmental factors like temperature, humidity, light, and CO2 concentration are precisely regulated to optimize growth.

Plant Hardiness Zones

Geographic regions defined by their average annual minimum winter temperature, used as a guide for determining which perennial plants are most likely to survive and thrive in a given location. The USDA Hardiness Zone Map is the most widely used system.

Pruning and Training

The selective removal of plant parts (branches, buds, roots) and the directing of plant growth into desired forms to improve health, increase fruit or flower production, manage size, and enhance aesthetics.

Composting

The controlled biological decomposition of organic materials such as food scraps, yard waste, and manure into humus-rich compost that improves soil structure, fertility, moisture retention, and microbial diversity.

Hydroponics

A method of growing plants without soil by delivering dissolved mineral nutrients directly to the plant roots through water. Systems include nutrient film technique, deep water culture, ebb-and-flow, and drip irrigation setups.

Key Terms at a Glance

Aeroponics:A soilless growing system in which plant roots are suspended in air and periodically misted with nutrient solution.

Arboriculture:The cultivation, management, and study of individual trees, shrubs, and other perennial woody plants.

Auxin:A class of plant growth hormones that regulate cell elongation, root initiation, apical dominance, and phototropism.

Bolting:The premature flowering and seed production in vegetable crops, usually caused by heat or day-length stress, which reduces crop quality.

Cambium:A thin layer of actively dividing cells between the bark and wood of a stem that produces new xylem and phloem tissue.

Cation Exchange Capacity:A measure of the soil's ability to retain and supply positively charged nutrient ions to plant roots.

Companion Planting:The practice of growing different plant species in proximity for pest control, pollination, nutrient sharing, or spatial efficiency.

Compost:Decomposed organic matter used as a soil amendment to improve structure, water retention, nutrient content, and microbial activity.

Controlled-Environment Agriculture:Plant production within enclosed structures where temperature, humidity, light, and other factors are precisely managed.

Cultivar:A cultivated variety of a plant selected for desirable characteristics and maintained through propagation. Denoted by single quotes, e.g., Malus domestica 'Honeycrisp'.

Deadheading:Removing faded or spent flowers from a plant to encourage continued blooming and prevent unwanted self-seeding.

Drip Irrigation:A low-pressure irrigation method that delivers water directly to the plant root zone through a system of tubes and emitters.

Floriculture:The branch of horticulture dealing with the cultivation and marketing of flowers and ornamental plants.

Grafting:A horticultural technique in which the scion of one plant is joined to the rootstock of another to combine desirable traits.

Hardening Off:The gradual exposure of greenhouse- or indoor-grown seedlings to outdoor conditions before transplanting.

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