How to Create a Japanese Autumn Garden in Tennessee (Design Principles‚ Plants & Care)
Japanese autumn gardens were designed to feature the color layering of the fall foliage‚ combined with water‚ stone‚ and scenery for contemplation of beauty that will be lost when winter comes․ The Japanese autumn garden tradition is centuries old‚ but Tennesseans have the luck of hot humid summer weather‚ and then a real autumn cold spell‚ to produce some of the best foliage colors anywhere outside of Japan․ Much of Middle and East Tennessee is in USDA zones 6b through 7b․ This climate is very similar to that of Kyoto and much of central Japan‚ and thus many of the plants used in the customary Japanese garden (such as Japanese maples‚ ginkgo‚ and bamboo) are not just exotic imports in Tennessee․ They thrive․
What sets these gardens apart from your average fall foliage?
Most American fall gardens are wild mixes of mums‚ pumpkins and whatever trees happen to change color first․ Japanese autumn gardens are more deliberate arrangements․ All of the components‚ from rock placements to water to spacing between trees‚ are arranged for a particular viewing angle‚ from a path‚ bench‚ or window (Japanese: momijigari niwa (““maple-viewing garden””))․ The point of the garden is to slow down and appreciate the character of the season‚ not to try to incorporate every single blooming plant․
It is based on a few principles that have endured for more than a thousand years:
Asymmetrical balance․ Nothing is planted in matching pairs or straight rows․ It may also simply refer to a single‚ dominant maple tree on one side of a pathway visually balanced by a small stone lantern on the other․
Borrowed scenery (shakkei)․ The garden is set up to include whatever is beyond its bounds‚ such as a distant ridge‚ or the tree line of a neighbor‚ to give it an expanded sense of space․
Restraint․ Japanese gardens use fewer plant species than Western gardens․ A few trees well placed will do more work than a dozen strewn about․
The Core Plants‚ and How They Perform in Tennessee
Japanese Maples (Acer palmatum) are the showstoppers of the autumn garden‚ full stop․ In Tennessee‚ they color up fabulously from mid-October to early November‚ depending on elevation and when the first hard frost hits․ For example‚ cultivars like ‘Bloodgood’ and ‘Emperor I’ hold their red longer here than they do further north‚ but they should still be in afternoon shade․ While the tree can survive zoned 7‚ Tennessee’s July and August sun will burn the leaf edges on a maple in full western exposure․ We only grow Japanese Maples that have been selected for the southeastern region․ It may not seem like much‚ but a maple grown in the Pacific Northwest will struggle its first year or two due to the humidity․
Ginkgoes turn a smooth golden yellow‚ then drop nearly all their leaves in a couple days after a good cold front․ This may be the most dramatic single moment in a fall garden․ Give ginkgo room‚ for they eventually grow 50-plus feet in height․ Sadly‚ they grow slowly‚ often adding less than a foot per year in the first decade of growth․ Only plant the male cultivars‚ unless you enjoy the smell of rotting fruit in your garden every October․
Bamboo provides winter structure and evergreen foliage after the maples shed their leaves in November․ Clumping bamboo offers a responsible species for the home garden; running bamboo would colonize an entire Tennessee yard in the space of two or three seasons if left to its own devices․ It has other uses‚ too: the sound and movement created by the wind is especially prized by the principles of Japanese garden design‚ where a garden that looks good but doesn’t move or sound like anything is considered incomplete․
Although moss is often overlooked in American versions of these gardens‚ it is very important․ Moss grows naturally in the ground under the trees‚ instead of grass or mulch‚ creating the quiet‚ subdued atmosphere of Japanese gardens․ In fact‚ clay and a humid climate make Tennessee’s moss very happy‚ since moss does best in the shade and moisture of maple trees where grass cannot grow․
Water‚ Stone‚ and the Elements People Often Get Wrong
The water should be quiet or slow-moving‚ not a bubbling fountain as more typical in a Western landscape․ A customary tsukubai‚ or stone basin‚ in a simple pond reflecting the canopy of maples overhead is likely to set the tone of the garden better than a more flamboyant display of water․ If you want koi‚ keep in mind that Tennessee winters require a pond of 24-30 inches in depth so the fish can winter below the freeze line․ In Middle Tennessee‚ this is only 4-6 inches down‚ but it may be deeper in a hard winter․
Also‚ when laying stones‚ many home gardeners lay out too much decorative gravel or lay stones out in a straight‚ even pattern which looks too much like a garden․ Laying stones in an odd grouping‚ asymmetrically‚ replicates a pattern found in nature and looks more natural․ A few large flagstones sunken in a bed of moss are preferable to a border of small‚ matching river rocks․
A Realistic Timeline
If you don’t have an existing garden‚ expect to spend a full season on basics (paths‚ water feature‚ hardscaping)․ Take a long-term view on trees․ A 6-8 foot Japanese maple provides a reasonable canopy within 3-4 years‚ but the big‚ wide-spreading specimens people photograph in Kyoto took 20-plus years to develop․ Bamboo and moss are much faster․ Bamboo takes just two growing seasons full height‚ and moss can cover bare ground in a year if kept moist․
Symbolism‚ Briefly
The brief red color of the maples symbolizes mono no aware‚ the awareness of change and impermanence of beautiful things‚ while ginkgo trees symbolize endurance‚ as they have not changed for 200 million years․ Bamboo bends without breaking‚ indicating resilience‚ and while one does not need to know this in order to enjoy the garden‚ it may be helpful to understand why these plants were selected above others․
If there be an old yard in Tennessee‚ just try one maple‚ put a moss bed below it‚ place a stone lantern beside it‚ that much will tell you more about the style than anything else․
