Growers rarely trellis ornamentals. Because they are small and light, there is no need to keep them from settling into the soil. Fertilizing ornamentals sparks little controversy. You can work another quarter cup of fertilizer in around the roots about 30 days after planting. During the growing season, your main job is fighting bugs.
Ornamentals suffer more damage than hardshells.
Worst of all are squash vine borers. By the time, you know they're there, your gourd vine isn't. Encourage root growth at joints, and use Thiodan or Sevin on the vine near the hill. Harvesting at the right time is the first key to curing ornamentals. Pick too soon and the gourds rot.