The state of New Jersey is in a transitional zone of climate; this means that both warm and cool weather grasses can be grown in this state with warmer grasses being grown in the north and cooler grasses in the southern end of the state. Warren County is in the northwestern portion of the state; therefore the county is home to cool season grasses.
You can identify Kentucky bluegrass by the bright green color of the blades. Bluegrass can better handle the colder climate of Warren County as well as warmer summer temperatures. Use Kentucky bluegrass for sunny lawns with heavy foot traffic. Be aware that bluegrass is susceptible to damage from heat, drought, disease and salt. This grass is a moderate to high maintenance turf grass that commonly needs thatching each year. It is the first to go dormant in the season. Plant Kentucky bluegrass in early spring or early autumn.
Look for ryegrass to be a dark green grass with a fine texture growing in bunches. Ryegrass does not form thatch and is tolerant to both heat and drought. Use this grass in blends with Kentucky bluegrass and fine fiscue. Watch for freeze damage or disease if this grass is exposed to flooding or heavy winds. Plant ryegrass in full sun.
You can use tall fiscue for areas where light maintenance is desired. You'll find it in shaded areas because this is the most shade-tolerant cool season grass for Warren County. Tall fiscue is a wear resistant turf grass that stays green late into the season. Use tall fiscue where drought resistance and tolerance to heavy foot traffic are required. Plant tall fiscue in autumn. Be aware that this type of turf takes time to establish and recover from damage.
You can locate fine fiscue by the extremely narrow needle-like blades. You should use fine fiscue in turfgrass mixes when shade tolerance is required. Avoid planting this turfgrass where heavy foot traffic is expected. Fine fiscue is tolerant to high pH levels, drought resistant and low maintenance. Be aware that fine fiscue is hard to mow because of the fine blades. Plant fine fiscue in autumn.