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Summer gardening calendar

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

April 16 - 22

Gardening too tough on your knees? We've got help. (Michael Pilla for The Boston Globe) Gardening too tough on your knees? We've got help.
Monday

16

This week and next transplant into the garden: Brussels, sprouts, broccoli, cabbage, cauliflower, lettuce.
Tuesday

17

Add color to your doorstep with containers of early spring annuals that can handle cold temperatures.
Wednesday

18

Watch the weather and bring containers inside on below-freezing nights.
Thursday

19

Put a 2- to 3-foot-wide mulch barrier, or ring, around trees to protect them from mowing equipment.
Friday

20

Earth Day! Commit to at least one eco-friendly gardening practice this season.
Saturday

21

Spray fruit trees to improve fruit set. Check with your garden professional for the proper materials.
Sunday

22

Gardening too tough on your knees? A raised bed brings the garden closer to you. Install one now to enjoy all season.
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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