91-98 Days to maturity. Heliotropium arborescens. Heliotrope Marine Seeds. Non-GMO, Annual. Ornamental. Marine heliotrope seeds are fragrant and delicate, yet hardy grow where others would decline. It is easy to grow from seed and far more resistant to disease and mildew than many other seasonal favorites. Marine heliotrope seeds promise spectacular and lasting blooms that are sure to add seasonal perfume to any garden or fresh-cut arrangement.