Prairie Star' is rather resistant to mildew diseases, with the exception of Black Rot and Anthracnose, to which it is moderately susceptible. Prairie Star has a tendency for its shoots to break off in strong winds early in the season. For successful vine management, this must be dealt with by using a low cordon or low fan training system, with catch wires to attach the shoots. However, as a wine grape, it will never be confused with Kay Gray. Louise' rarely exceeds 20 Brix, even if left to hang past midseason.
Acidity is moderate and needs no reduction.
Louise Swenson is also a very good seeded table grape, and could be used as a multi-purpose vine in backyard plantings. It has an orderly growth habit, with moderate vigor on most sites. Unlike its mother, Kay Gray, the clusters hang free of the tendrils. Disease resistance is generally very good, with some susceptibility to Anthracnose. Observations on very sandy sites suggest that 'Louise' is rather sensitive to droughty conditions.