There may be snow on the ground but spring is in the air: Today pitchers and catchers report to training camps, and the New Jersey Flower and Garden Show opens.

Yes, it’s that time of year when even the Mets have a shot at the pennant, when you still think this time you’ll finally plant delphiniums that don’t wither away.

Nothing you can do about the former. As to the latter, maybe you’ll discover that elusive perennial among the thousands of vegetables, herbs, shrubs and flowers at the Garden Show in the New Jersey Convention Center, running from today until Sunday. There will also be gardening workshops and expert speakers. More at www.macevents.com.

And if you want a solid grounding so you can go really in depth, sign up for a gardening class at Rutgers. Courses include Designing a Perennial Garden, Herbs for Flavor and Fragrance, and Organic Vegetable Gardening. Register at http://rutgersgardens.rutgers.edu/classes.html

Cape May is full of activities. Saturday there’s a crafts show at Convention Hall and a tour and tasting at Cape May Winery; Sunday Convention Hall hosts a antique show, and the Cape May Wine School holds a tasting course on “Winter Reds” at the Washington Inn. Get the lowdown from our friends at www.capemaytimes.com.

Back up north, they’re Havin’ a Party at the Mayo Center for the Performing Arts (www.mayoarts.org) Saturday night, with Southside Johnny and the Asbury Jukes in a benefit concert for the New Jersey Substance Abuse Programs for Adolescents.

And also Saturday, at NJPAC (www.njpac.org), the New Jersey Symphony Orchestra (www.njsymphony.org) presents its “Bravo Broadway” concert. It’s songs from West Side Story, My Fair Lady, Chicago, Wicked, Les Misérables, Mamma Mia! and Beauty and the Beast, sung by Great White Way luminaries Susan Egan, Melissa Errico and Gary Mauer.

But No, it really isn’t spring quite just yet. As if you needed proof, Saturday at 2 p.m. in Sea Isle City it’s the 14th Annual Polar Bear Plunge. Better yet: the post-plunge party at LaCosta Lounge (www.lacosta-seaisle.com). Check www.seaisletourism.org.

Or take your honey to Harrah’s (www.harrahs.com) for a post-Valentine’s celebration. Stake out a lounge chair in the casino’s stunning climate-controlled pool house.  You can sip your favorite summer drink at the huge new pool that everyone is buzzing about.

 You’ll turn up the heat on your winter weekend — and get both of you thinking warm thoughts. After all, spring is in the air.