May Garden Guide

gillnurseryMonthly Garden Guide12 Comments

Lawn Care

Apply Medina Growin’ Green or Milorganite to your lawn. Water in well approximately 30 minutes per area to begin working. These feed the soil and your lawn.

Prevent broadleaf weeds.

use Hi-Yield Crabgrass & Weed Preventer

Plant new grass.

Lay new sod or Bermuda seed anytime this month – plan to make time for watering!

Follow city watering guidelines.

Continue watering established lawns if we don’t have rain.

Visit:  City Watering Guidelines

Fix yellow spots.

Apply Nature’s Blend Compost to yellow spots in lawn.


Sunny areas:

Zinnias, Periwinkles, Moss Rose, Purslane, Lantana, Blue Daze, False Heather, Salvia, Ice Plant, Gomphrena, Ruellia, Coreopsis, Pentas


Moss Rose

Blue Daze


Shady areas:

Caladiums, Coleus, Begonias, Ageratum, Shrimp Plant, Torenia, Agapanthus, Snowbush



Shrimp Plant



Morning Glory, Moonflower, Zinnias, Sunflowers, Gomphrena


Morning Glory



All container grown hardy and tropical trees, shrubs, vines, grasses, groundcover, and citrus trees.

Read: Fruit Trees and Citrus in Your Own Backyard

Indoor Plants

Warm temps allow you to take your indoor plants outdoors for some fresh air. Just be sure to keep them protected from the sun. Shady patios are perfect for a short stay. Wash off the dust and bring them back in nice and clean.

Read: Plants, the Perfect Rx for Clean AirPro Planting Tip: Not Too Deep

Pro Tips for Houseplants

  • If your houseplant looks unhappy, think location first. It may need to be moved to a different spot with different lighting.
  • Keep them away from the AC vents (they like humidity and the AC dries them out)
  • General rule for watering; water well then re-water once the soil feels dry to the touch
  • Spring is time to start fertilizing your houseplants. Your plants will love organic Hasta Gro
  • If they are getting too big for their pots, bump up to a slightly larger pot. Watch video


All granular fertilizer should be watered in well.
    Tomato & Pepper Plants

    Fertilize regularly with organic Rose Glo or Hasta Gro, Plant Tone, or Medina Growin' Green, or conventionally with High Yield 21-0-0 (ammonium sulfate).

    Annuals & Perennials

    Use organic Medina Growin' Green, Rose Glo or Plant Tone, or Hasta Gro.

    Azaleas, Magnolias, Gardenias

    Fertilize organically with Maestro Gro-Rose Glo, or Espoma Azalea Food.


    Fertilize organically with Maestro Gro-Rose Glo.

    Hibiscus & Tropical Bloomers

    Use organic Maestro Gro-Rose Glo, or conventional Hibiscus Food.

    Trees & Shrubs

    Fertilize organically with Milorganite, Medina Growin' Green.


    All early spring bloomers if not already done, such as Azaleas, Indian Hawthorn and Carolina Jessamine.
    Trim hedges as needed to maintain good form.
    Poinsettias to approximately 12” tall.

    Watch Out For

    Mealy Bug Damage

    Powdery Mildew

    Fungus, Powdery Mildew

    Treat organically with Neem OilUse Fertilome Liquid Systemic Fungicide on ornamentals.

    Grub Worms

    Use organic Spinosad Soap, or conventional Season Long Grub Control.

    Spider Mites

    Treat organically with Spinosad Soap or conventionally with Cyonara, Bonide Systemic.

    Lace Bugs on Lantana

    Use Cyonara.

    Read: Lacebugs on Lantana

    Chinch Bugs

    Use organic Diatomaceous Earth, or Spinosad, or conventional Cyonara.

    Read: Check For Chinch Bugs If Your Lawn Looks Dry Even Though You Know It’s Not!

    Mealy Bugs

    Treat organically with Neem Oil, or Insecticidal Soap, or conventionally with Bonide Systemic.

    Read: Mealy Bugs are Here

    Fleas & Ticks

    Treat organically with Spinosad, Diatomaceous Earth, or conventionally with Cyonara.

    Read: Got Fleas?


    When watering during periods of windy dry conditions, it’s important to water slow and deep. Be sure to watch the spray of your sprinkler and adjust accordingly with the wind

    Water all plants well after planting and regularly through the first year. Plants will begin to use more water as they grow and bloom. Outdoor potted plants dry out quickly as do hanging baskets and small annuals.


    Apply mulch around trees, flowerbeds and vegetable gardens to reduce weeds and help retain moisture. We like cypress, hardwood and pinestraw mulch. These reduce weeds well and will not float away.

    Pine Straw Mulch

    Cypress Mulch

    Hardwood Mulch

    12 Comments on “May Garden Guide”

    1. The gusty wind broke the newest citrus tree I planted 6 months ago. About 60% of the branches and leaves are gone. If I continue watering it do you think it will grow back or should I scrap it and buy another one and start over?

      1. I have personally seen a young citrus tree backed over by a truck, the tires did not hit it but it snapped off about 12″ above the ground with no limbs left. Saw it again 2 years later and it is a nice little tree with fruit on it.

    2. Just want to receive your suggestions for plants in our area.
      Tips and ideas for planting and care.

      1. There are some articles and info sheets on our website, and some videos as well. Also on our facebook page. If you come in, we have some info sheets printed out, and many knowledgeable people.

    3. I have some kind of ash tree that keeps popping up in my gardens. There seems to be two varieties. The leaves are compound and opposite up to 7. I am wondering if they are Texas Ash trees and will the roots be a detriment to my foundation of my house. Do they grow wild, as none of them have been planted? Not sure what they are or if I should let a few grow.

    4. Thank you for your response, but can you tell me how and why are these Rio Grande ash trees keep popping up in my gardens? Have pulled out about 10 so far.

    5. Very helpful info. I’m from Sri Lanka with a shady strip for a garden. I love lush green gardens. Do you have any suggestions for me to achieve my dream garden even with the shade?

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