- watch for explosion of insects in yard
- plant warm weather vegetables and annuals, generally after Mother's Day

- plant summer blooming bulbs (early to mid)
- plant snap beans
- check for European pine sawfly emergence (early)

- apply broadleaf weed control on lawns if needed
- apply post-emergence crabgrass control if needed
- apply birch leaf miner control if needed

- apply gypsy moth control if needed
- apply imidacloprid or halofenozide for grub prevention if needed (late)
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- deer tick nymph peak activity (late May
into early June)
- Lone star tick nymph peak activity (May into July)
- dog tick larval peak activity (May into June). adult peak activity (May)
- annual bluegrass (turf weed) in seed

- March fly activity
- carpenter bees
- Andrenid ground nesting bees
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