• Remove all dead branches on established trees.
  • Pine needle disease treatments are needed again in mid-June. Apply Copper Fungicide.
  • Cultivate and mulch using Gold Diamond Cedar Mulch. This reduces about 70% of the summer yard maintenance.
  • See Marcum’s Watering Guidelines for new and established trees.
  • Ensure that your automatic irrigation system working properly.
  • Mulch wherever possible to conserve moisture. Prune wisteria and shrubs that bloom on old wood after they are done flowering.
  • To prevent them from wasting energy on producing seed, deadhead your spring bulbs after they are done blooming. Also, fertilize them. But wait till the leaves have yellowed before trimming them off.


  • Fertilize warm season grasses using Original Slow Release Fertilizer 18-6-12 (20 lbs covers 5,000 sq. feet) or Big Mont’s Nitro Green 31-0-0.
  • By mid-May, “Dollar Spot” disease may be visible on lawns. Apply ferti-lome Liquid Systemic Fungicide or ferti-lome F-Stop. Be sure to fertilize prior to applying a fungicide.
  • Seed warm-season grasses (Bermuda and Zoysia) in mid-May through the end of June.
  • Meet water requirements of turf. Check out what the Oklahoma County Extension says about for additional turf care here.


  • Plant your container Ball & Burlap (B & B) trees.
  • Plant container shrubs and perennials.
  • Plant heat loving annuals: pentas, periwinkles, potato vine, etc.


  • Remain alert for insect damage and add spider mites to the list. Foliage may become pale and speckled; juniper foliage turns a pale yellowish color. Shake a branch over white paper and watch for tiny specks that crawl.
  • Look carefully for bagworms. These are tiny brown bags barely visible to the eye. If found, easier to treat at earlier stages rather than later. Apply Hi-Yield Malathion, Natural Guard by ferti-lome Spinosad.
  • For preventative white grub treatments, apply Hi-Yield Grub Free Zone II in late June to mid-July.
  • Post-emergent control of crabgrass and summer annual grasses is best performed on young plants using ferti-lome Weed Out with Q. This product kills crabgrass, dandelion, clover, plus 200 other listed weeds.
  • Apply Sedgehammer Turf Herbicide or Image Nutsedge Killer to eliminate yellow and purple nutsedge.
  • Monitor potential June bug (Phyllophaga longispina) damage.
  • Place row covers or netting over bushes with ripening berries to keep the birds from eating them.


Note: Thanks to Oklahoma Coop Extension Service for providing some of the suggested maintenance guidelines.

For questions regarding June maintenance guidelines, please call Goldsby 405 288-2368, Oklahoma City 405 691-9100,  Norman 405 447-3100 or Ardmore 580 223-1846.