Late Frosts Threaten New Plantings
Gardeners are being warned that a late spring frost can undo weeks of work — advice today ranged from general cold‑protection how‑to to urgent local alerts: Virginians were told to bring outdoor plants back inside until Thursday, orchardists in West Virginia faced temperatures in the 20s, and central Ohio saw morning lows in the 20s to low 30s. (If you’ve recently moved seedlings outdoors, coverings or temporary shelter are recommended right now.) ( )
A tomato seedling can look perfectly happy at 4 p.m. and be blackened by 8 a.m. if the temperature slips below 32 degrees Fahrenheit overnight. That is why gardeners across Virginia, West Virginia, and Ohio got the same message this week: treat early April like a trap, not like summer. (epicgardening.com) The danger is not just “cold weather.” Frost forms when surfaces lose heat into a clear night sky, and tender new leaves, blossoms, and transplants get hit first because they are full of soft, watery growth. (epicgardening.com) That is why the safest move for a newly planted pepper, basil, or tomato is often the least glamorous one: pick it up and bring it back inside. The Winchester Star warned Shenandoah Valley gardeners on April 9 to move outdoor plants indoors until Thursday because the cold snap was not over yet. (winchesterstar.com) If a plant is already in the ground, the goal is to trap the day’s leftover heat in the soil. Epic Gardening recommended covering plants before sunset with frost cloth, sheets, or blankets that reach the ground, then removing them after sunrise so leaves do not stay damp and cold. (epicgardening.com) Plastic is the common mistake. Epic Gardening warned that plastic touching leaves can make frost damage worse, so the cover needs a little air gap, like a tent instead of shrink-wrap. (epicgardening.com) For home gardeners, a lost seedling is annoying. For orchardists, one night in the 20s can wipe out the crop that pays the bills, because apple and peach trees in bloom cannot simply be carried into a garage. (wvmetronews.com) West Virginia MetroNews reported on April 8 that growers in the Eastern Panhandle were dealing with temperatures in the 20s, and some were using wind machines, irrigation, and other protection methods to keep tender blossoms from freezing. (wvmetronews.com) Ohio’s warning came with a calendar reminder. 10TV said the average last spring freeze in Columbus is April 18, with dates ranging from April 17 in Circleville to April 30 in Logan, so a warm weekend in early April still sits inside normal freeze season. (10tv.com) That is the part that fools people every year: trees leaf out, garden centers fill up, afternoons hit the 60s, and the overnight low still drops into the upper 20s or low 30s. In central Ohio, 10TV said those were exactly the kinds of morning temperatures showing up this week. (10tv.com) So the rule for this week is simple and very literal. If you can lift it, bring it inside; if you cannot lift it, cover it before dark; and if you are tempted to trust one warm afternoon in April, check your local overnight forecast first. (winchesterstar.com)
