In August 1594 there were negotiations for Augusta to marry Maurice, Prince of Orange, involving her sister the Queen of Scotland, but the plan was abandoned.

The Gottorp councillor Casper Hoyer, stable master in Eiderstedt, was sent to Danish Chancellor Niels Kaas repeatedly to negotiate with him on the matter.

When in 1610 John Adolf fired the Lutheran vicar Jacob Fabricius the Elder, general provost for Holstein and Schleswig ducal share, and replaced him with a Calvinist, Philipp Caesar, as the official vicar of the ducal court in 1614, Augusta refused to attend service and went by foot to the Lutheran church in Schleswig.

The lady met Arbella Stuart and Henry Wotton and visited Basing House, Woodstock Palace, and Oxford.

She supported and recommended the persecuted writer Anna Ovena Hoyer, when she fled from Holstein-Gottorp to the Swedish queen, Maria Eleonora of Brandenburg in 1632.