To measure planting distance, use the mature width of the plant as a guide. Plant specimens so the center of each plant is distanced according to that mature width.
Here's a breakdown of how to measure and determine appropriate planting distance:
Determining Planting Distance Based on Mature Size
The primary factor in determining planting distance is the mature size of the plant. Failing to account for this can lead to overcrowding, reduced air circulation (increasing disease risk), and competition for resources.
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Width is Key: The most important dimension to consider for spacing is the width of the plant at maturity, not its height.
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Measure from Center to Center: The distance between plants is measured from the center of one plant to the center of the next.
Calculating Planting Distance
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Identify Mature Width: Find out how wide the plant will grow at maturity. This information is usually available on plant tags, seed packets, or from reputable online resources (e.g., university extension websites).
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Use the Full Width: If a plant is expected to be 6 feet wide at maturity, you should space the plants so that the center of each plant is 6 feet apart.
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Consider Growing Conditions: Adjust the spacing slightly based on your specific growing conditions. If you have exceptionally fertile soil or abundant water, plants might grow larger than average, requiring slightly more space. Conversely, in poor soil, plants might remain smaller.
Examples
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Example 1: A shrub with a mature width of 4 feet should be planted with its center 4 feet from the center of the next shrub.
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Example 2: A groundcover that spreads to 1 foot wide should be planted with its center 1 foot from the center of the next groundcover plant.
Consequences of Incorrect Spacing
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Overcrowding: Plants compete for sunlight, water, and nutrients, leading to stunted growth and poor health.
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Disease: Reduced air circulation creates a humid environment that favors the development of fungal diseases.
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Aesthetics: Overcrowding can ruin the intended aesthetic effect of your garden.
Special Considerations
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Hedgerows: When planting a hedge, you might plant closer together than the full mature width to create a denser screen. Consult specific recommendations for the species of hedge you are planting.
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Thinning: For some fast-growing plants, especially annuals, it can be practical to overseed and then thin the seedlings to the correct spacing.
By understanding how to measure and calculate appropriate planting distances, you can ensure the long-term health and beauty of your garden.
