When to Bring Tender Plants Indoors on Long Island

East Hampton (Zone 7a) gardeners face a mixed basket: gardenias, lantana, periwinkles, impatiens, and potted herbs. Here's a plant-by-plant timeline.

Now (Late Summer): Pot Up Everything

Potting now lets you move plants instantly when cold threatens. Use fresh potting mix and containers with drainage.

Gardenias: The Divas

• Hardy to 28°F if hardened off (gradually exposed to cooler nights).
• Leave outside until nights consistently hit 35°F.
• Indoors: 55–65°F, bright light, high humidity (use a pebble tray). Bud drop is common if conditions aren't met.

Lantana & Periwinkle (Catharanthus)

• Not cold-hardy. Bring in before first frost (usually mid-October).
• Lantana prone to spider mites indoors—shower weekly.
• Catharanthus (annual vinca) rarely overwinters well; consider replacing next spring.

Impatiens

Easy houseplants in east/west windows. Pinch to keep bushy. Feed with high-phosphorus fertilizer.

Herbs: Know Your Types

• Perennials (rosemary, thyme, sage, oregano): Need a cold period. Keep in unheated garage (30–40°F) or cold frame.
• Annuals (basil, cilantro, dill): Won't survive winter. Harvest and replace.
• Tender perennials (lemon verbena, scented geraniums): Treat like lantana—bright, cool window.

Pro Tip

Order winter-blooming Cattleya orchids now for January color—they thrive in the same conditions as your gardenias.