Here’s a zone-by-zone to-do list for the month of March.
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March To-Do List For Zone 4
On apple and mountain ash trees, prune away branches killed by fire blight to prevent further spread of the disease; also prune black knots off of cherries. Make cuts 1 foot below the diseased area. Disinfect pruners with a 10 percent bleach solution between cuts.
Start pepper and eggplant seeds indoors under lights.
Start seeds of zinnias, salvia, petunias, and nicotiana indoors under lights.
Pot up seedlings started last month and potbound houseplants.
Don't rush to remove mulch from perennials: The sun could heat the soil and stimulate new growth, which the hard freezes still to come could damage.
March To-Do List For Zone 4
