Experimental growth of 35 kinds of plants for landscaping was operated for 26 months to investigate possibility of growth under low intensity of illumination indoors set to 400 lux, 1, 300 lux, and 1, 700 lux per year respectively.
Consequently, the experiment suggest that 11 kinds of plants, such as Cinnamomum camphora Sieb.(nursery stock), Camellia sasanqua Thunb., Eurya spp., Ilex cornuta Lindl. ex Paxt, Sarcococca humilis Stapf, Pachysandora terminalis Sieb. et Zucc., Ophiopogon japonicus Ker. f. nanus hort., Carex morrowii Boott f. expallida T. Koyama, Hedera helix 'Glacier', Woodwardia orientalis Swartz, and Asplenium prolongatum Hook., can grow under intensity of 400 lux per year. Also under 1, 300 lux, 19 kinds including Cinnamomum camphora Sieb.(adult tree), Dendropanax trifidus Makino, Cedrus deodara Loud., Hosta sieboldii J. Ingram, Hosta spp., Saxifraga fortunei Hook. f. var. incisolobata Nakai, Sasa veitchii f. minor Rehd., and Selaginella uncinata Spring, and 11 kinds above can grow, and with 1, 700 lux, the kinds of plants increase to 22 kinds including 19 kinds above and Citrus junos Sieb. es T. Tanaka, Metasequoia glyptosorobopdes Hu et Cheng, Aucuba japonica spp., Hypericum patulum Thunb., and Hypericum spp.
Compared with contrasting plants outdoors, apparent differences were recognized in the shape of leaves and flowers, branches, as well as the growth of new leaves, under all low illuminated conditions.

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The strangely shaped rocks yielded from Lake Tai (Taihu) in the southern Chinese provinces of Jiangsu and Zhejiang are regarded as one of the traditional elements characterizing Chinese gardens.Taihu rocks (jap.Taikoseki) started to become popular among scholars during the late 8th to the early 9th century.In the beginning of the 12th century Taihu rocks met passionate acceptance not only from scholars, but also among the general people.
This paper argues that, however popular the Taihu rocks may have been from the 12th century onwards, it seems that they were still distributed in relatively small numbers. From extant records it seems obvious that they were only put up and displayed in the gardens of a few enthusiasts, some of whom had their residences near Lake Tai, and others being driven by a fanatical interest in this special type of rock to have it transported to distant places. Not surprisingly those who did get those rocks to their faraway homes had strong social power and connections.
The relative scarcity of Taihu rocks in contemporary records and other texts up to the 17th century proves that “traditional” Chinese gardens of that period may probably have looked completely different from what we imagine today

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With the common and colorful wildflowers being lost at an alarming rate, the value of wildflowers as landscaping material is being reconsidered. Rannunculus japonicus Thunb. is a typical Japanese wild flower and is sometimes observed along foot paths or abandoned cultivated land. The aim of this study was to determine the suitable time to cut the population of R. japonicus. Cutting tests were performed with potted plants and the plants were cut at different seasons and at 2 cm above ground
Flowering occurs during early and middle of May, and the size of the plants was gradually reduced after summer. Cutting in April before flowering reduced the number of flowers and the number of seeds to half that in the noncutting plants. Cutting the plants in full bloom in May prevented further flowering after cutting. Cutting after the middle of June did not influence the number of flowers or seeds. Even cutting three times a year did not cause fatal consumption of the subterranean part. On the contrary, the root weight increased to 2.5 times the weight at the time of initial planting.
Therefore, to produce to natural regeneration by seeds and sufficient flowers, cutting should be done after the middle of June. Where weeds are growing vigorously it may be necessary to cut again, in August and October.

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