GARDENERS ARE A HOPEFUL BUNCH, and new varieties can be pretty enticing. They can also be disheartening. After planting yet another new coreopsis only to watch it croak, it’s not hard to imagine myself as Charlie Brown lying on my back, having triedand failed to kick that football yet again.After whiffing a few times, consumers and pros alike may be tempted simply to stick to time-tested varieties. But some of those varieties aren't what they once were. In other cases, they’ve been upgraded in meaningful ways that improve the gardening experience—better habit, longer bloom time, enhanced disease resistance. Before you swear off new plants forever, consider these classic upgrades.
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