Capsicum futescens, hot peppers. Start early from seed indoors or grow from purchased starts. Harvest before they produce a large number of black seeds. Strip the leaves and hang to air dry. Red and pink flowers dry the best.
Golds are less successful.
Gomphrena globosa, Globe amaranth. Start seeds indoors early from seed or grow from start. This flower resembles clover flower. Hang to air-dry. Gypsophila paniculata, Baby's breath.