Answer: Heliotrope seeds can be started indoors or out, depending upon personal preference. Start indoors 10-12 weeks before your last frost, or outdoors 2-3 weeks after last frost. Sow seeds in prepared bed or moistened seed starting mix and barely cover. Seeds will germinate in 2-42 days when kept at 70-75F. Plants should be spaced 12" apart in rich, well-drained soil. Pinch back young plants to encourage bushiness and deadhead regularly to prolong bloom. Heliotrope prefer full sun but enjoy afternoon shade where summers are hot.
Q&A Library Searching Tips