Independent buying guides for balcony and small-space gardeners

Balcony Garden Glossary: 22 Terms Explained

The words that show up in balcony garden specs, reviews and how-to guides, explained without jargon. Open any term for the full explanation and what to look for when buying.

Aphids
Small, soft-bodied sap-feeding insects that cluster on new growth and are among the most common balcony pests.
Read more about aphids
Blossom end rot
A dark, sunken patch on the bottom of tomatoes and peppers caused by inconsistent watering and calcium uptake.
Read more about blossom end rot
Companion planting
Growing certain plants near each other to support pest control, pollination or space use in a small area.
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Compost
Decomposed organic matter added to potting mix to improve nutrients, structure and moisture retention.
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Container gardening
Growing plants in pots, planters or grow bags instead of in open ground, the standard approach on a balcony.
Read more about container gardening
Deadheading
Removing spent flowers from a plant to redirect energy into new blooms instead of seed production.
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Determinate tomato
A bush-type tomato that grows to a set height and ripens most of its fruit in a short window.
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Drainage hole
An opening in the bottom of a container that lets excess water escape so plant roots do not rot.
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Drip irrigation
Tubing and emitters that deliver slow, steady water to each container, often controlled by a timer.
Read more about drip irrigationRelated: Best Drip Irrigation Kits for Balcony Gardens
Fabric grow bag
A breathable fabric container that air-prunes roots and weighs far less than ceramic or plastic pots.
Read more about fabric grow bagRelated: Best Fabric Grow Bags for Balcony Gardening
First frost date
The average date of the first fall frost in your area, used to time harvests and cold protection.
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Full sun
At least six hours of direct sunlight a day, needed by many fruiting vegetables and flowers.
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Hardening off
Gradually exposing indoor-raised seedlings to outdoor conditions over one to two weeks before planting out.
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Indeterminate tomato
A vining tomato that keeps growing and fruiting all season, needing a large pot and tall support.
Read more about indeterminate tomatoRelated: Best Plant Support Stakes
Load limit
The maximum weight a balcony structure is designed to safely carry, including wet soil, pots and furniture.
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Microclimate
The local conditions on your balcony, such as wind, reflected heat or building shade, that can differ from the forecast.
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Neem oil
A plant-derived oil used as an organic treatment for common pests like aphids and spider mites.
Read more about neem oilRelated: Best Neem Oil for Plants and Pest Control
Potting mix
A light, soilless growing medium made for containers. Garden soil compacts in pots and drains poorly.
Read more about potting mixRelated: Best Potting Soil
Railing planter
A planter that hangs over or clips onto a balcony rail, always secured so it cannot fall.
Read more about railing planterRelated: Best Balcony Railing Planters
Root bound
A condition where roots fill and circle a container, restricting growth and water uptake in older plants.
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Self-watering planter
A container with a built-in water reservoir that wicks moisture up to the soil, cutting down daily watering.
Read more about self-watering planterRelated: Best Self-Watering Planters for Balconies
Trellising
Training vining or climbing plants up a support structure to save floor space in a small container garden.
Read more about trellising