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Summer gardening calendar

These activities can be done on any day of the week — By Ellen Wells, Globe Correspondent

April 23- 29

Celebrate Earth Day this week by getting back to your roots. (Handout photo) Celebrate Earth Day this week by getting back to your roots.
Monday

23

Sow seeds indoors: cucumbers, melons, squash, lettuce. Sow seeds outdoors: carrots, chard, beets, radishes, lettuce. Transplant into your garden: Brussels sprouts, broccoli, cauliflower, lettuce.
Tuesday

24

Introduce those potted herbs that have been indoors all winter to the warming spring weather. When day temperatures reach 55 to 60 degrees, place them outside for a few hours each day, gradually increasing their light exposure over the next few weeks.
Wednesday

25

Thursday

21

Tiptoe through the tulips . . . and daffodils and other colorful spring-blooming bulbs.
Friday

27

Saturday

23

Sunday

24

Sow seeds indoors: Last chance for lettuce. Sow seeds outdoors: carrots, chard, beets, radishes, lettuce. Transplant into the garden: lettuce.
These guidelines are all dependent on Mother Nature, of course, and your location. For the Boston area, Zone 6 hardiness puts the last frost date around May 1. For Zone 5, add a week; Zone 4, add two. But that doesn't mean cold nights are gone for good. Keep a careful eye on your local weather forecast to watch for unseasonably cold temperatures. Find your USDA Hardiness Zone at www.garden.org/zipzone.

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