Effects of compound medium on seven herbaceous flower species

In order to enrich the species diversity of urban green space, the biological characteristics of seven herbaceous flower species and the suitable growth substrate were explored. The effects of different proportional compound substrates including peat, vermiculite and perlite on the growth of seven herbaceous flowers were studied by randomizing block field experiment. The results showed that seven herbaceous flowers all grew well and could exhibit their excellent ornamental traits. The best ornamental florescence period was 28.7~93.7 d, and the evergreen period was 178.3~246.3 d. The compound substrate (peat:perlite:vermiculite=7:2:1) was optimal for growth and development of seven herbaceous flowers. Compared with the control, the emergence rates of Lavandula angustifolia cv. Grace and Echinacea purpurea cv. Purple were significantly better in intelligent greenhouse (P<0.05), and all reached 94.4%. The plant height, root length and root number of Delphinium grandiflorum cv. Red hat and Verbena hybrida cv. Crystal were higher than the control, the growth and development of other flowers were good as well.