Trials were conducted by R. Redden, T. Usher, W. Tompkins, D. Lack, J. Hardy and B. Whitting, while R. Wright assisted in the production of quarantine status disease-free seed. Protection under plant variety rights has been sought for Spearfelt. Spearfelt has a highly determinate, erect growth habit with an average height of 47 cm. It is more erect and lodging resistant than Actolac, Gallaroy, Sirius and Rainbird. Branching is very compact and pods are widely distributed on both the main stem and branches.
Leaves are of medium size, elongated rhomboid in shape and medium green in colour.
Flowers are white with small calyx's. Pods are green and medium length, and do not contain anthocyanin pigmentation before maturity. Seeds are small and white, with a 100-seed weight of 18.7 g. This is slightly smaller than the old standards Gallaroy and Actolac, and also smaller than the new cultivars Rainbird and Sirius. It matured 5 days later than Actolac, but 1 and 2 days earlier than Rainbird and Sirius, respectively.