8 Colo. Code Regs. § 1203-5, pt. 3.0
Nursery stock shall not be sold with any kind of mechanical injury including but not limited to girdling, which significantly impairs the viability of the plant.
GENERAL
All container grown nursery stock shall be kept and displayed under conditions of temperature, light and moisture sufficient to maintain the continuing viability and vigor of the stock. Container grown nursery stock shall not be sold or offered for sale in a root bound condition as evidenced by roots that have grown around the circumference of the container's interior in a horizontal circular manner that adversely affects the viability of the plant.
NON-PLANTABLE CONTAINER
Nursery stock grown in a non-plantable container shall be established in the container and shall exhibit a well-rooted condition as evidenced by the presence of visible fibrous roots sufficient to keep the soil ball intact when removed from the container.
PLANTABLE CONTAINER
Nursery stock grown in a plantable container shall be placed in a container of a size adequate to contain the root system. Root systems for nursery stock grown in plantable containers shall conform to descriptions given under 2.1 and 2.2 of these rules.
GENERAL
Packaged and unpackaged bare root nursery stock shall be kept and displayed under conditions of temperature and moisture sufficient to maintain the continuing viability and vigor. Such bare root nursery stock shall also be kept and displayed under conditions that will prevent etiolated or otherwise abnormal growth. Evergreens shall not be sold as bare root stock, except seedlings and transplants 12 inches or under.
WAXING
Colored waxes or other materials that coat the aerial parts of the plant and change the appearance of the plant surface in a manner that prevents adequate inspection are prohibited.
GENERAL
All balled nursery stock shall be kept and displayed under conditions of temperature, light and moisture sufficient to maintain the continuing viability and vigor of the stock.
BALLED AND BURLAPPED NURSERY STOCK
Balled and burlapped nursery stock shall be kept and displayed with the soil ball 75 percent covered by a moisture-retaining material such as soil, straw, sawdust, shrink wrap or mulch that will prevent desiccation of the root system and handled in such a manner that the soil ball will not become broken or loose. Balled and burlapped nursery stock with broken or loose soil balls shall not be offered for sale. Balled and burlapped nursery stock shall not be sold or offered for sale with girdling roots.
BALLED AND POTTED STOCK
Balled and potted nursery stock shall be kept and displayed in such a manner that the soil ball will not become broken or loose. Balled and potted nursery stock with broken or loose soil balls shall not be offered for sale.
SPECIFICATIONS
Turfgrass sod shall be free of prohibited weeds, as specified in 9.0, and of the following grass species, except when any of these species is labeled for sale purposes in accordance with § 35-26-104(3), C.R.S., and Rule 4.2:
and shall contain no more than three plants of any other weed, as defined in 1.19, per 36 square feet of sod. Each 36 square feet of sod that is sold containing more than three plants of any other weed shall constitute a separate violation of these rules.
DISPLAY CONDITIONS
Harvested turfgrass sod shall, when offered for sale, be kept and displayed in such a manner that will maintain the continuing viability of the sod.
Bench packed nursery stock shall be kept and displayed with the roots surrounded by a moisture-retaining material such as soil, straw, sawdust or mulch in a manner that will prevent desiccation and encased in burlap or other material or placed in a container to hold the growing medium in place. Bench packed nursery stock shall be kept and displayed under conditions of temperature, light and moisture sufficient to maintain the continuing viability and vigor of the nursery stock. Root systems for bench packed stock shall conform to descriptions given under 2.1 and 2.2 of these rules. Evergreens shall not be sold as bench packed stock.
In-ground fabric bag-grown nursery stock shall be kept and displayed under conditions of temperature, light and moisture sufficient to maintain the continuing viability and vigor of the stock. The bags shall be surrounded by a moisture retaining material to prevent desiccation of the root systems.
8 CCR 1203-5, pt. 3.0