Ten culinary and ornamental herbs were evaluated for time and quality of rooting of tip cuttings. The taxa included in the study were oregano (Origanum vulgare), lemon thyme (Thymus ×citriodorata), applemint (Mentha suavolens), Persian catnip (Nepeta ×faassenii), lemon balm (Melissa officinalis), southernwood (Artemisia abrotanum), caraway thyme (Thymus herba-barona), hyssop (Hyssopus officinalis), `Blue Wonder' catnip (Nepeta `Blue Wonder'), pineapplemint (Mentha suavolens var. variegata). Four replicates of each species were used. The cuttings, untreated and rooting hormone treated, were placed under intermittent mist, then cuttings potted when a 1- to 1.5-inch root ball had developed. Most of the stock suffered from some chlorosis during rooting; southernwood cuttings particularly displayed severe chlorosis which was overcome with 2 weeks of constant-feed fertilizer after potting. Oregano displayed the best results, rooting in seven days with or without treatment. It produced a sellable 4-inch pot in 31 days from sticking the cuttings. Lemon thyme, applemint, Persian catnip, and lemon balm all rooted in 14 days if treated. No difference was observed in days to rooting between treated and untreated lemon thyme. Untreated cuttings of lemon balm, applemint, and Persian catnip rooted in 25 to 30 days. Treated applemint cuttings not only rooted more quickly but produced a marketable 4-inch pot in significantly less time. Southernwood and caraway thyme rooted in 25 days, with no significant difference between treated and untreated cuttings. Hyssop, pineapplemint, and `Blue Wonder' catnip took about 30 days, also with no significant difference between treated and untreated cuttings.
Water soluble rooting substances were obtained from selected woody ornamentals by the centrifugal diffusion method from the cuttings, or by the water extraction method from the ground freeze-dried cuttings. Species used were Cotoneaster racemiflora soongorica, Euonymus fortunei carrierei, Ilex opaca, Lonicera maacki, Physocarpus amurensis, Symplocos paniculata, Taxus cuspidata, Viburnum burkwoodi, and V. opulus. The centrifugal diffusates from Cotoneaster racemiflora soongorica, Euonymus fortunei carrierei, and Symplocos paniculata promoted rooting of mung bean cuttings. Generally the centrifugal diffusates from all of the species studied contained 4 root-promoting fractions with Rf’s, in isopropanol:ammonia:water, of 0–0.1, 0.2–0.4, 0.6–0.8, and 0.8–1.0. All of these fractions promoted rooting of mung bean cuttings without added indole-3-acetic acid. The fraction at Rf 0-0.1 caused the strongest root promotion. Similar results were found in the water extract from the freeze-dried materials. The results strongly suggest that diffusible and water-soluble rooting substances commonly exist among many species of woody plants.
patents are 61% of all varietal rights and virtually all are for horticultural plants ( Drew, 2010 ). Ornamental plants account for 77% of all horticultural IP rights and 84% of all plant patents ( Drew, 2010 ). The steady growth of bedding and gardening
currently grow pollinator-friendly plants. To assist in plant selection, various organizations have published inventories of ornamentals to include in home pollinator gardens ( Pollinator Partnership, 2017 ; Royal Horticultural Society, 2018 ; Xerces
In addition to breeding cultivars for commercial blueberry ( Vaccinium sp.) production, ornamental value has been a trait of interest for many blueberry breeders for a number of years ( Galletta and Ballington, 1996 ). An older dwarf cultivar
applications are often required for postemergence herbicides and may cause ornamental plant injury if spray drift occurs. Selective preemergence herbicides registered for yellow nutsedge control in landscapes include dichlobenil, dimethenamid-P, and metolachlor
‘Weeping Dragon’ is a new ornamental citrus cultivar released 30 June 2016 ( Bowman, 2016 ) by the Agricultural Research Service (ARS) of the U.S. Dept. of Agriculture. The major positive attributes of this unique ornamental citrus scion are the
fruits. The cactus family (Cactaceae) is confined to the New World but has been distributed worldwide. Cacti ( Fig. 14 ) have become important world crops for fruit (cactus pear, pitaya), vegetables (cladodes), animal feed, and ornamentals. Cactus is also
Ornamental crabapples ( Malus sp.), with their breathtaking display of resplendent blooms in spring and colorful fruit in autumn, are one of the most popular ornamental plants adorning the northern hemisphere ( Cronin et al., 2020 ; Fiala, 1994