Weeds - So Called



Annual bluegrass Poa annua. Annual low-growing, cool-season weed.

Aster, roadside Aster exilis. Annual broad-leafed wildflower with white or light blue flowers in fall. Control by improving the moisture level and fertility of the soil.

Dallisgrass   Paspalum dilatatum. Long lived, warm season, deep rooted perennial bunch grass. Form low flat clumps with dead looking centers and tall fast growing seed heads.


oathead (puncture vine) Tribulus terrestris. Hairy, low-growing annual with a taproot and several stems forming a rosette. Has yellow flowers and burs that will puncture tires. Sam control as grassburs.

Goosegrass (silver crabgrass) Eleusine indica. Annual that reproduces by seed in unhealthy soil. Very similar to crabgrass.

Henbit     A species of Lamium that I consider a wildflower. Control if you must by mowing or spot spraying with vinegar-based herbicides.

Mistletoe    Plant parasite that primarily attaches to limbs and trunks of low quality and/or stressed trees, such as Arizona ash, hackberry, bois d’ arc, locust, boxelder, and weak elms and ashes. Remove by cutting infected limbs off the tree. If that can’t be done, notch into the limb to remove the rooting structure of the mistletoe and paint with black pruning paint to prevent resprout. There are no magic chemical or organic sprays. Keeping the soil and trees healthy is the best preventative.

Nutgrass   Cyperus rotundus. Perennial sedge introduced from Eurasia. Spreads by seed, nutlets, and creeping tendrils. Likes wet soil. Remove with mechanical devices. Control in turf by planting ryegrass in the fall.

Poison ivy    Deciduous vine that grows in sun or shade and spreads easily underground. Has red berries and red fall color. Do not allow to flower and produce seed. Remove, compost and spray new growth with vinegar based organic herbicides.

Ragweed     Ambrosia spp. Annual broadleaf that indicates droughty soil. Releases a potent pollen that causes hay fever. Control by cultivation, mowing, building the soil and spraying with vinegar-based organic herbicides.

Rescuegrass      Bromus catharticus. Cool-season annual bromegrass. Control by broadcasting corn gluten meal in early October or before seed germinates.

Sandbur    Cenchrus pauciflorus. Annual grass plant that produces a bur with strong, sharp spines. Seeds in the bur can lie dormant in the soil for years before germinating. Control by increasing the carbon in the soil with humates, dry molasses and/or corn gluten meal.

Spurge   Euphorbia spp. Sappy succulents, annuals or perennials that like hot, dry weather. Control by spot spraying vinegar-based organic herbicides.

Preemergent control of all weeds growing from seed is done by the application of corn gluten meal at 20 lbs. per 1,000 square feet before the germination of the targeted seed. In general the timing is February 15 – March 15 in the spring for summer weeds and September 15-October 15 in the fall for the winter weeds. It can also be used after tilling or otherwise worked soil to prevent the growth of disturbed seed.


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