May Lawn & Garden To-Do List

Keep your lawn watered, especially if you applied fertilizer.


    • Fertilize warm-season grasses (such as St. Augustine, zoysia, Bermuda, and centipede). Stop fertilizing cool-season grasses (such as fescue and bluegrass) to prevent heat damage.
    • Mowing season has begun! Set mower blades at 2”- 3” or higher for cool-season grasses. Warm-season grasses can be cut lower. Mow often and don’t cut more than half the blade at a time.

I keep rosemary by the kitchen door for cooking.

Vegetables and Herbs

    • Enjoy cool-season vegetables (such as spinach, carrots, and lettuce) before hot weather brings an end to the harvest.
    • Plant warm-season vegetables (such as tomatoes, peppers, and corn) after the last frost.
    • Plant successive crops of veggies every few weeks to extend your harvest.
    • Control weeds to reduce competition for water and nutrients.
    • Enjoy strawberry season while it lasts!
    • Address insect and disease problems as soon as you spot them.
    • Keep up with the harvest to encourage your plants to continue producing.
  • Don’t apply sprays to plants that are blooming or fruiting.

Houseplants will begin their spring growing season this month.


    • Once nighttime temperatures are above 50° F, put your houseplants outdoors on a shady porch so they can enjoy the summer heat while protected from strong sun and wind.
    • You can also bury potted houseplants up to the rim in planting beds to add texture.
    • Repot root bound houseplants.
  • If not repotting, remove the top inch of soil and replace it with fresh compost.

Nesting houses are an easy way to ensure hours of bird watching.

Cleanup and Maintenance

    • Make sure that lawns and gardens receive an inch of water per week. Hand water new transplants until they become established.
    • Get ready for bird nesting season!
    • Apply mulch under plants to keep the soil cool this summer.
    • Be on the lookout for lace bugs and aphids this month.
    • Examine conifers for the egg sacs of bagworms and remove before the eggs hatch.
    • Take photos of blooming plants you enjoy, so you’ll know what to buy for your own garden!
    • Try something new this year – visit a specialty plant nursery and explore the many varieties of plants available.
    • Don’t let weeds and vines get out of control – remove (or prune) them while they’re manageable.
    • Add water lilies to your pond when the water temperature reaches 70° F.

Further Information


  1. I viewed on your webpage the list of tips for preparing mowers at the beginning of a season. Have you considered a how to on blade sharpening. There are grinding tools (Dremel bits, or power drill bits, or table top grinders)and simple tools like hand files. What are the pros and cons and your recommended best approach.


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