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Homes & Gardens reports that tender annuals, dahlias and warm-season vegetables are among the plants most vulnerable to an early frost. Experts recommend covering plants before a cold night, securing breathable material to the ground, and removing covers after temperatures rise; the supplied report ends before its full list and advice are complete.
Homes & Gardens has published advice on protecting frost-sensitive garden plants when an unexpected cold night arrives, highlighting tender annuals, dahlias and warm-season vegetables as vulnerable examples. Landscape designer Kat Aul Cervoni and gardening author Kate Copsey recommend watching overnight forecasts and covering plants before temperatures fall, while the report notes that the right response depends on the plant and garden conditions.
Cervoni, founder of Staghorn Living, says she starts paying attention when overnight forecasts fall into the mid-30s Fahrenheit, because frost can form on plant surfaces even when the official air temperature remains slightly above freezing. She says damaged leaves may look dark, water-soaked, limp or translucent before turning brown or black.
For tender annuals such as coleus, impatiens, begonias, zinnias and basil, Cervoni recommends lightweight frost cloth or horticultural fleece. A bedsheet can work in a pinch, she says, if it is draped to the ground and its edges are secured to retain warmth from the soil. She advises against plastic resting directly on leaves, since contact can transfer cold and covered plants may overheat after sunrise.
Dahlias are another concern: Cervoni says a single frost can blacken their foliage and end their display, making it important to prepare plants for colder weather. She recommends supporting covers with stakes or hoops so the material does not crush stems and flowers, then putting covers on before temperatures drop and removing them the next morning once temperatures are above freezing. For dry beds, watering earlier in the day may help because moderately moist soil retains heat better than very dry soil.
Warm-season crops including tomatoes, peppers, eggplants, cucumbers, squash and beans are also susceptible, Cervoni says, and container plants need protection before the first frost. Frost cloth or fleece can provide protection, and cold frames are another option. The supplied report excerpt ends as it begins to discuss crops that are more cold-tolerant, so it does not provide the full comparison or complete all five categories in its headline.
Protecting Crops Before a Cold Night
An early frost can cut short ornamental displays and damage edible crops before gardeners expect the growing season to end. Forecast timing matters: checking overnight lows gives gardeners an opportunity to cover vulnerable plants before temperatures fall rather than discovering damage in the morning.
Protection is not one-size-fits-all. Cover placement and timing affect whether a cover traps warmth without pressing against delicate foliage or remaining on long enough to cause overheating. The guidance also points to local conditions: frost risk can vary across a single yard, so a forecast alone may not describe the temperatures every plant experiences.
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How Yard Conditions Affect Frost
The report describes frost risk as dependent on more than the general air-temperature forecast. Cold air settles in low areas, so plants at the bottom of a slope or in a valley may face greater exposure than plants higher up. Areas near walls can stay warmer for a few extra degrees, according to the report.
These differences are known as microclimates. The report says moving air can make frost less likely to settle, while cloud cover can limit the loss of warmth accumulated during the day. Copsey, author of New York & New Jersey Gardening, says frost cloth, sheets or cold frames can usually protect plants when air temperatures are above 30°F; she describes frost between 30°F and 32°F as less severe and often spotty. These are attributed observations, not a guarantee for every garden or plant.
“I start paying attention when overnight temperatures are forecast to fall into the mid-30s, since frost can form on plant surfaces even when the official air temperature is a few degrees above freezing.”
— Kat Aul Cervoni, landscape designer and founder of Staghorn Living, as quoted by Homes & Gardens
Limits of the Frost Advice
The supplied source excerpt does not include the complete list promised by its headline: it begins a contrast with more cold-tolerant crops but cuts off before naming them. It also does not show the identities or advice for all five plant types, so the plants described here should not be treated as a complete ranking.
Exact frost damage varies by plant, exposure, local microclimate and how long cold conditions last. The report gives expert guidance but does not provide a forecast for a particular location or guarantee that a cover will prevent damage. No publication date is supplied in the source material.
Check Forecasts and Cover Plants
Gardeners facing a possible cold night can check local overnight forecasts, identify tender annuals, dahlias and warm-season crops, and prepare covers before evening temperatures drop. Covers should be secured to the ground where appropriate and removed after temperatures rise above freezing, following Cervoni’s guidance.
The source material provides no scheduled follow-up or local frost advisory. The immediate next step is to monitor conditions in the garden, including colder low spots, and consult the complete Homes & Gardens report for its full plant list and recommendations.
Key Questions
Which plants does the report identify as vulnerable to early frost?
It names tender annuals such as coleus, impatiens, begonias, zinnias and basil, along with dahlias and warm-season vegetables including tomatoes, peppers, eggplants, cucumbers, squash and beans. The supplied excerpt does not contain the complete five-category list promised in the headline.
When should I start preparing plants for frost?
Cervoni says she pays attention when overnight forecasts fall into the mid-30s Fahrenheit, since frost can form on plant surfaces above the official freezing point. The precise risk varies with local conditions and the plant.
What should I use to cover plants?
The report recommends frost cloth or horticultural fleece; a bedsheet can work in a pinch. Cervoni advises securing the material to the ground and avoiding plastic placed directly against foliage.
Should plant covers stay on during the day?
Cervoni recommends removing them the next morning once temperatures are above freezing. She says leaving plants covered longer than necessary can be undesirable, and plastic covers may allow plants to overheat after the sun comes out.
Are all parts of a garden equally at risk?
No. The report says cold air gathers in low areas, while places near walls may stay warmer. These microclimates can mean plants in the same garden face different frost exposure.
Source: rss
