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株間・条間計算機

レイズドベッド、畝、生垣、畑の面積から必要な株数を正確に算出。実寸比率の2D配置図をプレビューし、正方形植えと千鳥植えを比較。育苗トレイ数や予備苗、総費用まで見積もります。

クイック読込:

Sunlit cedar raised garden bed showing even rows of head lettuce, sweet basil, and staked tomatoes

12" × 12" • 18" × 36"4×8 ft Bed

境界枠を考慮した厳密幾何計算

1. 作物選択または株間手動入力カスタム幾何計算

2. 畝の寸法と単位

畝の長さ (ft)

畝の幅 (ft)

3. 植栽パターンと株間

株間 (s) (in)中心間

条間 (r) (in)

境界マージン（あぜ・へり） (in)

注文予備苗・枠マージン詳細設定

辺ごとに個別マージン設定 (in)4辺の余白を個別に指定

上 (北)

下 (南)

左 (西)

右 (東)

条の向き

千鳥植えの開始行

購入数量・トレイ規格・予備苗

予備苗マージン (%)

活着率・発芽率

セルトレイ穴数

苗・ポット単価

収容可能な株数

4 rows × 8 plants

Spacing Used

12" × 12"

Square Grid (spacing = 12.0")

植栽密度

1.00 / ft²

Bed: 32 ft² (Usable: 21 ft²)

発注必要株数

36(36 pots)

Est. Cost: $162.00 (+10% spares)

この畝での配置比較: 4×8 ft 畝正方格子 = 32•千鳥配置 = 30

千鳥配置では交互に株数が変化し空間利用効率が高まります

縮尺2D配置図樹冠・根系リング表示寸法・余白ライン表示行番号ラベル表示

株の中心位置確保半径 (s/2)有効境界ライン

定番レイアウト

作物別推奨株間・条間一覧表

野菜・草花・宿根草・生垣樹木の公的基準データ。分類フィルターや和名・学名検索に対応。

作物 / 品種	株間 (cm)	条間 (cm)	推奨パターン	出典機関
Bush Tomato Staked or Caged Bed	18" (15–24")	36" (30–42")	18–24 in	University of Minnesota Extension↗
Climbing Tomato Trellis or Large Cage	24" (18–36")	42" (36–48")	24–36 in	University of Minnesota Extension↗
Head Lettuce (Romaine / Crisphead) Garden Bed	12" (10–14")	12" (12–18")	10–12 in	University of Minnesota Extension↗
Carrots (Garden Bed) Raised Bed	3" (2–4")	3" (3–12")	3–4 in	University of Minnesota Extension↗
Bell & Sweet Pepper Garden Bed or Rows	18" (14–24")	18" (18–30")	16–20 in	UF/IFAS Extension↗
Sweet Corn Block Rows for Wind Pollination	9" (8–12")	30" (24–36")	12–15 in	University of Minnesota Extension↗
Strawberry (Garden Bed) Raised Bed	12" (10–14")	12" (12–18")	12–14 in	University of Minnesota Extension↗
Sweet Basil Herb Bed / Garden Row	10" (8–12")	12" (10–18")	10–14 in	University of Maryland Extension↗
Creeping Thyme Zigzag Groundcover Plugs	12" (8–15")	12" (8–15")	12–18 in	University of Illinois Extension↗
Hosta (Medium Shade Plant) Shade Garden Bed	24" (18–30")	24" (18–30")	24–32 in	University of Illinois Extension↗
Daylily (Landscape Flower) Flowering Border Bed	18" (15–24")	18" (15–24")	18–24 in	University of Illinois Extension↗
Boxwood (Low Edging Hedge) Clipped Low Hedge	12" (10–15")	15" (12–18")	18–24 in	Royal Horticultural Society (RHS)↗
Boxwood (Tall Privacy Hedge) Formal Boundary Hedge	24" (18–30")	30" (24–36")	36–48 in	Royal Horticultural Society (RHS)↗
Arborvitae 'Emerald Green' Privacy Screen Row	36" (30–48")	42" (36–60")	36–48 in	Royal Horticultural Society (RHS)↗
Arborvitae 'Green Giant' Fast-Growing Windbreak & Screen	72" (60–96")	120" (96–144")	12–18 ft	North Carolina State Extension↗
Dwarf Apple Tree Trellised Fruit Row	48" (36–60")	144" (120–168")	4–6 ft	eXtension Apple Rootstock Consortium↗
Semi-Dwarf Apple Tree Backyard Orchard	180" (144–216")	240" (216–288")	12–15 ft	Penn State Extension↗
Apple Tree (Full-Size Standard) Traditional Homestead Orchard	300" (240–360")	360" (300–420")	20–25 ft	University of Maine Cooperative Extension↗
Peach & Nectarine Tree Open-Center (Bowl Shape) Orchard	216" (180–240")	240" (216–288")	15–18 ft	Clemson University Cooperative Extension↗
Sweet Cherry Tree Backyard Cherry Tree	168" (120–216")	216" (180–264")	10–14 ft	Washington State University Tree Fruit Extension↗

Showing 8 of 20 popular plants

野菜類の栽植距離一覧

矮性品種はつる性品種よりも狭い株間で栽培可能です。高畝・畝立て栽培は通路面積を圧縮し面積効率を最大化します。

ハーブ・草花・宿根草

株立ち性多年草は3年目の成育幅を目安に配置し、風通しを維持しながら雑草繁茂を防ぎます。

グランドカバー・自生植物・低木

地被植物は千鳥（正三角形）配置で定植することで、正方配置よりも短期間で隙間のない緑の絨毯を形成します。

生け垣・果樹・果樹園

生け垣は刈り込み目隠し重視か自然樹形重視かにより間隔を調整します。果樹の間隔は台木（わい性か実生か）に依存します。

区画シミュレーター

レイズドベッドに何株植えられるか？

代表的なサイズをテスト。枠際のマージンを考慮した正確な収容株数をリアルタイム表示します。

レイズドベッドに何株植えられるか？

1. Select Standard Bed Size

2. On-Centre Spacing (s)

3. Layout Geometry

Exact Plant Capacity:32 Plants

Row Breakdown:4 rows of 8

Perimeter Setback (s/2):6 inches

8 ft Length × 4 ft WidthPlanting Space: 84" × 36"

Dotted orange boundary shows internal s/2 setback keeping outer foliage safely inside walls.

Square Grid vs. TriangularExact Bounded Plant Counts (Margin Policy: s/2)

View Table ↓

On-Centre Spacing	Setback (s/2)	4×4 ft Bed	3×6 ft Bed	4×8 ft Bed (Sq / Tri)
3 in (7.6 cm)	1.5 in	256	288	512 Sq / 567 Zigzag
4 in (10.2 cm)	2.0 in	144	162	288 Sq / 318 Zigzag
6 in (15.2 cm)	3.0 in	64	72	128 Sq / 135 Zigzag
12 in (30.5 cm)	6.0 in	16 Sq / 14 Zigzag	18 Sq / 16 Zigzag	32 Sq / 30 Zigzag
18 in (45.7 cm)	9.0 in	4 Sq / 6 Zigzag	8 Sq / 7 Zigzag	10 Sq / 13 Zigzag
24 in (61.0 cm)	12.0 in	4 Sq / 3 Zigzag	3 Sq / 4 Zigzag	8 Sq / 7 Zigzag

Notice the 12-inch row on a 4×8 ft bed: While an unbounded area formula claims triangular spacing holds +15.47% more plants, inside a finite 4×8 ft boundary with 6-inch setbacks, only 4 rows fit vertically (3 × 10.39" = 31.18" ≤ 36") and every second staggered row loses 1 position at the side margin (8 + 7 + 8 + 7 = 30).

現場作業チェック

図面から畑へ：正確に植え付ける5ステップ

3-4-5のピタゴラス法で完璧な直角を出し、定規棒やコンパス法でメジャーなしに千鳥配置を再現。

Squaring Bed Corners with 3-4-5 Triangle

Pythagorean Field Method

Raised beds with crooked angles cause row lines to drift against frame walls. Measure 3 units along one side, 4 units along the perpendicular, and adjust until the diagonal is exactly 5 units for a guaranteed 90° right angle.

Formula: a² + b² = c² → 3² + 4² = 9 + 16 = 25 = 5²

Wooden garden ruler, twine string lines, and dibber measuring even seedling spacing in a raised bed

Square Corners (3-4-5)

Measure 3 ft along the edge and 4 ft along the perpendicular; if diagonal measures 5 ft, your corners are exactly 90°.

Cut Gauge Sticks

Cut a scrap wooden lathe to your margin distance (s / 2) and spacing (s) for rapid field marking.

Staggered Offsets

For triangular grids, offset every alternate row by s / 2 and compress row pitch to 0.866 × s.

Dig Without Compacting

Stand on reach boards or perimeter aisles. Never step directly on freshly fluffed, prepared raised bed soil.

Align Drip Emitters

Sync your 8", 12", or 18" in-line drip emitters directly alongside plant stems before burying root balls under mulch.

園芸・農学の原則

混植・間作・リレー栽培の時間差設計

キャベツが大きくなる前の空きスペースで21日大根（ラディッシュ）を収穫する時間軸の有効活用。

プランター・鉢植え

コンテナ・不織布ポット・ベランダ菜園の株数

鉢植えでは土の容量が株数を決定づけます。20L（5ガロン）や40Lポットの適正株数早見表。

Illustration of a 5-gallon terracotta container with pepper plant

12" Diameter (19 L)

5-Gallon Bucket / Pot

The workhorse for patio gardeners. Holds enough root volume for heavy feeders or a tight cluster of small greens.

Fits: 1 Tomato (caged), 1 Bell Pepper, 4 Lettuces, or 9 Carrots.

16" Diameter (38 L)

10-Gallon Fabric Grow Bag

Fabric bags air-prune roots, preventing root circling and boosting nutrient uptake in hot weather.

Fits: 2 Pepper plants, 1 Bush Zucchini, 6 Bush Beans, or 3 Kale plants.

Illustration of a 20-gallon half-barrel planter with tomato and basil companions

20" Diameter (75 L)

20-Gallon Smart Pot

Sufficient thermal mass to buffer midsummer root temperature swings. Ideal for companion mini-guilds.

Fits: 1 Large Tomato + 2 Basil + 2 Marigolds, or 4 Potato seed pieces.

Illustration of a cedar window box planter holding four evenly spaced herb and lettuce clumps

6" Depth × 30" Long

Window & Railing Boxes

Shallow soil depth dries fast. Reserve for culinary herbs and shallow fibrous-rooted salad greens.

Fits: 4–5 Herbs (chives, thyme, parsley) at 5–6" on-centre spacing.

コンパニオンプランツ

混植・間作・リレー栽培の時間差設計

キャベツが大きくなる前の空きスペースで21日大根（ラディッシュ）を収穫する時間軸の有効活用。

Tomato (Red) at 24" O.C., Basil (Green) at 12" offset, Marigolds (Yellow) in borders.

Primary Main Crop & Days to Maturity Offset↓

Primary Main Crop	Companion Intercrop	Intercrop Spacing	Days to Maturity Offset	Horticultural Mechanism
Tomato (Indeterminate)	Sweet Basil / Marigold	12 in (30 cm) from stem	Concurrent (summer-long)	Basil enhances vigor; marigolds deter nematodes & hornworms.
Cabbage / Broccoli	Radish / Baby Spinach	6 in (15 cm) between heads	-45 days (harvested early)	Radishes mature in 21 days before cabbage leaves touch.
Carrot (Slow Germinators)	French Breakfast Radish	Mixed in same seed furrow	-50 days (row marker)	Radishes break soil crust and mark rows for weeding carrots.
Sweet Corn (Block)	Climbing Snap Beans	6 in (15 cm) from corn base	Sown 3 weeks after corn	Beans climb corn stalks, fixing atmospheric N for grain fill.

園芸・農学の原則

日当たり・風通し・根の深さのバランス

適切な株間は朝露を素早く乾かしてうどんこ病や疫病を防ぎ、深根性と浅根性の組み合わせで養分競合を回避します。

Canopy Airflow & Disease Prevention

When foliage remains wet for over 6 hours under high relative humidity (>85%), fungal pathogens like powdery mildew, Septoria leaf spot, and early blight flourish.

The Rule: In humid climates or wet summers, increase on-centre crop spacing by 15–25% to allow morning dew to dry within 90 minutes of dawn.

Solar Geometry & North-South Orientation

Rows planted in a North-to-South line receive even sunlight on both flanks (morning sun on the east side, afternoon sun on the west side). East-to-West rows suffer from southern self-shading.

The Rule: Always place trellised climbing crops (pole beans, indeterminate tomatoes, cucumbers) strictly on the northern perimeter of your bed.

Root Architecture & Soil Stratification

Plants feed at different soil depths. Deep taproot crops (carrots, parsnips, daikon) penetrate 12–24 inches down, while shallow leafy greens feed primarily in the upper 4–6 inches.

The Rule: Pair deep taproots with shallow fibrous surface feeders to exploit different soil horizons without competing for nitrogen or water.

気候対応

地域や気候に合わせた株間の調整

梅雨や多湿地域では病気予防のため株間を15〜25%広げ、猛暑地では地面を覆う密植で地温上昇を防ぎます。

UK & Maritime Europe

High Humidity & Lower Solar Flux

Frequent drizzle and persistent cloud cover increase fungal spore transmission. Recommendation: Add +15% to standard between-row spacing and prune indeterminate tomatoes to single stems (cordons) up canes. Reference RHS hedging distances (30–60 cm).

US Southwest & Australia

Arid Heat & High Evaporation

High UV and dry winds strip soil moisture rapidly. Recommendation: Tighten staggered triangular spacing to create an interlocking "living mulch" canopy. This reduces soil temperature by 8–10°F and protects roots when combined with sub-surface drip irrigation.

US Midwest & Canada

Short Growing Seasons (Zones 3–5)

Only 90–120 frost-free days. Recommendation: Adopt Square Foot Gardening in dark compost-amended raised beds that thaw 2–3 weeks earlier in spring. Keep beds at 4 ft maximum width so spring poly tunnels and floating row covers fit snugly.

Subtropical & US Southeast

Heavy Summer Rains & Blight

Torrential downpours splash soil microbes onto low leaves. Recommendation: Stake or cage all vegetables at least 24–30" apart on-centre, mulch heavily with pine straw or clean wheat straw, and prune all foliage within 12" of the ground.

Metric vs. Imperial Quick Distance Guide

Common seed packet instructions translated between metric allotments and imperial gardens:

3 in

7.5 cm

4 in

10 cm

6 in

15 cm

8 in

20 cm

12 in (1')

30 cm

18 in (1.5')

45 cm

24 in (2')

60 cm

36 in (3')

90 cm

種まきと定植

すじまき・点まき vs. 定植株間 vs. ニンニク・球根

ニンジンの密まきを発芽後の最終株間と混同しないように。ニンニク片やチューリップ球根の正確な間隔。

1. Sowing Density vs. Final Stand

Carrots, beets, and radishes are sown at 2–3 seeds per inch to ensure an unbroken stand despite 70–85% seed germination rates. Once seedlings produce their first true leaves, thin to final 3–4" on-centre spacing.

2. Garlic & Shallot Cloves

Fall-planted garlic cloves do not need thinning. Plant individual cloves root-side down, pointed tip up, exactly 6 inches apart on-centre in a square or staggered grid, at a depth of 2 inches.

3. Spring Bulbs (Tulips & Daffodils)

Follow the universal bulb rule: plant at a depth equal to 3× the bulb's vertical height, and space bulbs 2 to 3× their diameter apart (4–6" for large Darwin hybrid tulips; 3" for crocus plugs).

Crop	Initial Sowing Rate	Germination Days	Thinning Stage	Final On-Centre Spacing
Carrot	3–4 seeds / inch	10–18 days	At 1.5" tall	3 in (7.5 cm)
Table Beet	1 cluster / 2 inches	7–12 days	At 2" tall (thinnings edible)	4 in (10 cm)
Spinach	1 seed / inch	6–10 days	At 2 true leaves	6 in (15 cm)
Fall Garlic	Single clove (no thinning)	Spring emergence	None (direct placed)	6 in (15 cm)
Seed Potato Tuber	1 tuber piece in trench	14–21 days	Hill soil around stems	12 in (30 cm)

収量目安

1.2×2.4 m レイズドベッドの予想収穫量

約3 m²の区画からどれだけの野菜が採れるか？試験場データに基づく1株あたり・区画あたりの平均収穫重量。

Crop	Recommended Spacing	Plants in 4×8 Bed	Avg. Yield Per Plant	Est. Total Bed Harvest
Indeterminate Tomato	24" O.C. (caged / staked)	4 plants	15–20 lbs (6.8–9 kg)	60–80 lbs (27–36 kg)
Sweet Bell Pepper	18" O.C.	8 plants	5–7 lbs (2.2–3.2 kg)	40–55 lbs (18–25 kg)
Bush Snap Green Beans	6" O.C. grid	32 plants	0.75–1.0 lb (0.35–0.45 kg)	25–35 lbs (11–16 kg)
Garden Strawberries	12" triangular staggered	30 plants	0.7–1.0 lb (0.3–0.45 kg)	20–30 lbs (9–14 kg)
Carrots (Danvers / Nantes)	3" O.C. grid	128 plants	1 root (0.2–0.25 lb)	25–32 lbs (11–14 kg)
Head Lettuce (Bibb / Romaine)	12" O.C. grid	18 plants	1 head (~0.8 lb)	14–16 lbs (6.5–7.3 kg)
Bush Zucchini	36" O.C.	2 plants	15–25 lbs (6.8–11.3 kg)	30–50 lbs (14–23 kg)

Yield estimates assume fertile, well-draining garden soil amended with compost, 6+ hours of full sun daily, and consistent irrigation.

計算式解説

株間計算の数学的計算式と具体例

長さと株間を必ず同一単位に揃えたうえで、整数化（床関数 floor）を適用します。

Square and Rectangular Layout Count

For a bed of length L, width W, margins m_l, m_r, m_t, m_b, in-row spacing s, and row pitch r:

Plants along row = floor(Usable Length / Plant Spacing) + 1

Number of rows = floor(Usable Width / Row Spacing) + 1

Total Plants = Plants per row × Number of rows

Worked Example: 96" × 48" bed, 6" margins on all sides, 12" spacing → n_x = floor(84/12)+1 = 8; n_y = floor(36/12)+1 = 4; N = 32 plants.

Triangular Spacing Formula

Equilateral staggered rows compress vertical row-to-row pitch by sin(60°) while shifting alternate rows by s / 2:

Row gap ≈ 0.87 × Plant Spacing

Number of rows = floor(Usable Width / Row gap) + 1

Shifted row skips half a plant space at start

Worked Example: On the same 96" × 48" bed at 12" spacing, h = 10.39" gives 4 rows. Odd rows hold 8 plants; offset rows hold 7 plants → 8 + 7 + 8 + 7 = 30 plants.

Plants Per Square Foot, Square Metre & Reverse Density

When only total area A is known, or when solving spacing from a target population P:

Est. Plants = Total Area / (Plant Spacing × Row Spacing)

Square Grid Spacing = √(Area / Target Plants)

Plant Spacing = Area / (Target Plants × Row Spacing)

Worked Example: 1 hectare (10,000 m²) with 0.75 m rows and target 60,000 plants requires s = 10000 / (60000 × 0.75) = 0.2222 m (22.2 cm).

Boundary Geometry

Plant Spacing for Different Garden Shapes

Square and Rectangular Beds

Supported with exact coordinate generation on our calculator, including independent 4-side setbacks and 90° grid rotation.

Rows, Hedges, and Borders

Switch to Row / Hedge Mode above to calculate single or double-staggered linear plantings with explicit start and end insets.

Circular and Triangular Flower Beds

Circular beds require radial point-in-circle lattice testing rather than simple πr² / s² division.

Irregular Beds, Paths, and Obstacles

Polygon boundary drawing and obstacle exclusion zones are planned for Phase 3; until then, partition complex beds into rectangular zones.

Intensive Food Production

Vegetable Gardens, Raised Beds, and Square Foot Gardening

1, 4, 9, and 16 Plants Per Square Foot

Select the Sq. Foot pattern in the calculator to snap spacing to 12" (1/ft²), 6" (4/ft²), 4" (9/ft²), or 3" (16/ft²) grids with automatic half-cell margins.

Crop-Specific Spacing and Planting Systems

Not every tomato fits in one square foot: pruned single-leader indeterminate tomatoes on a trellis can be spaced at 15–18", whereas unpruned determinate bush tomatoes require 24–36".

Mixed Beds, Trellised Plants, and Row Access

Place tall trellised crops on the north or east edge of raised beds to avoid shading low salad greens, and keep reach-in bed widths to 4 ft maximum.

Ornamental & Ecological Design

Landscape, Groundcover, Native Plant, and Perennial Spacing

Planting Plugs and Landscape Flats

Use the Units / Flat selector in Advanced Options (32, 50, or 72-plug trays) to convert your required plant count into whole nursery flats.

On-Centre Spacing for Groundcover Coverage

Groundcovers spaced at 6–12" on-centre in a triangular pattern knit together rapidly to shade out weed seeds on slopes and parkways.

Shrubs, Hedges, and Privacy Screens

Clipped formal hedges (such as dwarf boxwood) are spaced closer than naturalised screens so branch tips intertwine into a continuous wall.

Native Plant Garden Layouts

Dense matrix plantings (12–15" O.C.) pairing native sedges (Carex) with upright forbs reduce mulching costs and provide interlocking root support.

Agronomy & Arboriculture

Tree, Orchard, and Field Plant Spacing

Fruit Tree and Rootstock Considerations

Apple and pear spacing is dictated by rootstock: high-density dwarfing stocks (M.9/B.9) space at 3–6 ft in-row, semi-dwarf at 12–16 ft, and standard trees at 20–25+ ft.

Plants Per Acre and Hectare

Switch to Area / Field Mode to calculate theoretical plant population per acre (43,560 ft²) or hectare (10,000 m²) and reverse-solve row intervals.

Corn and Other Row-Crop Spacing

Home sweet corn requires at least a 4×4 block for wind pollination, whereas commercial field corn targets 28,000–36,000 plants/acre in 30-inch rows.

その他の専門計算ツール

生垣専用、10アール・1ヘクタールあたり株数計算、トウモロコシ専用計算機など多彩なツール。

Raised Bed Spacing

2×4, 4×4, and 4×8 ft frame templates with border wall setback visualization.

Open Tool →

Triangular Plant Spacing

Equilateral staggered grid solver with axis rotation and exact vs. theoretical comparison.

Open Tool →

Square Foot Gardening

Interactive foot-square planner for 1, 4, 9, and 16 positions per square foot.

Open Tool →

Hedge Spacing Calculator

Single and double zig-zag privacy hedge layouts with start/end post insets.

Open Tool →

Groundcover & Plugs

Calculate plug flats (32, 50, 72 cells) and on-centre coverage for landscape beds.

Open Tool →

Plant Density Calculator

Convert spacing to plants per ft², m², acre, and hectare with inverse density math.

Open Tool →

Plants Per Acre / Hectare

Row-crop population solver for farm acreage, row pitch, and seeding establishment.

Open Tool →

Corn Spacing Calculator

Sweet corn pollination blocks vs. commercial field corn target stand populations.

Open Tool →

Common Questions

Plant Spacing Calculator FAQs

「株間30cm」とは具体的にどこの長さを指しますか？+

植物の根元（中心茎）から隣の植物の根元（中心茎）までの直線距離が30cmであることを意味します。ポリポットの端や葉先からの距離ではありません。

1.2×2.4mの畝で千鳥植えにすると36株ではなく30株になるのはなぜですか？+

無限に広い畑では千鳥植えで密度が15.47%増えますが、周囲に15cmの縁を残す有限の枠内では、条間短縮（h = 26.4cm）により収まる条数は4条のままとなり、互い違いにずらした条では両端で1株ずつ減るためです（8 + 7 + 8 + 7 = 30株）。

「株間」と「条間」の違いは何ですか？+

株間（s）は同じ列（畝）の中で隣り合う苗同士の距離です。条間（r）は平行する列と列の間の幅で、管理作業や風通しのために株間より広く取ることが一般的です。

レイズドベッドの木枠からはどれくらい離して植えるべきですか？+

株間の半分（s / 2）を枠際マージンとして空けるのが園芸の基本です。根や外葉が木枠に押し付けられず健やかに成長します。

生垣や花壇の植栽では何パーセント予備苗を用意すべきですか？+

通常5%〜10%の予備苗を見込んで発注します。定植時の傷みや初期の立ち枯れが発生しても、同じ生産ロットの苗ですぐに補植できます。

メートル法とヤードポンド法は切り替えできますか？+

はい。画面上部の M / CM または FT / IN をクリックするだけで、配置比率を保ったまま全寸法が瞬時に自動換算されます。

学術的根拠

計算アルゴリズムと園芸データの根拠

幾何学的な格子計算と、仕立て方・台木に応じた栽培基準を厳格に分離して設計。

Internal canonical unit: Metres (m) with ε = 1e-9 floating-point boundary guard.

University of Minnesota Extension

Vegetable crop and field planning guides; determinate vs. indeterminate tomato, sweet corn, pepper, and root crop spacing ranges.

extension.umn.edu →

Royal Horticultural Society (RHS)

Formal, informal, and double-row staggered hedging distances (30–60 cm typical, up to 90 cm for large conifers/screens).

rhs.org.uk/plants/types/hedges →

University of Illinois Extension

Groundcover on-centre spacing, plug tray density tables, and perennial crown spacing recommendations for Midwest landscapes.

extension.illinois.edu →

UF/IFAS & Extension Apple Rootstocks

Warm-climate vegetable spacing adjustments and orchard tree spacing by dwarfing rootstock class.

gardeningsolutions.ifas.ufl.edu →

株間・条間計算機

2. 畝の寸法と単位

3. 植栽パターンと株間

人気の菜園プラン（ワンクリック読込）

キッチンガーデン（トマト・ピーマン・バジル）

スクエアフット菜園（葉物・ラディッシュ）

千鳥2列の目隠しグリーンフェンス

蜜源・宿根草ガーデン（千鳥グリッド）

受粉率を高めるトウモロコシのブロック植え

法面保護・グランドカバー千鳥植え

作物別 推奨株間・条間一覧表

野菜類の栽植距離一覧

ハーブ・草花・宿根草

グランドカバー・自生植物・低木

生け垣・果樹・果樹園

レイズドベッドに何株植えられるか？

レイズドベッドに何株植えられるか？

正方形植え vs. 条植え vs. 千鳥植え（正三角形）

「芯々間隔（株間）」とはどう測るか？

Setback Allowance: Margin = s / 2

4つの簡単ステップで作付計画を計算

1. 畝の寸法と単位を入力

2. 作物と株間を選択

3. 配置パターンを選択

4. 図面の確認とエクスポート

図面から畑へ：正確に植え付ける5ステップ

Squaring Bed Corners with 3-4-5 Triangle

Square Corners (3-4-5)

Cut Gauge Sticks

Staggered Offsets

Dig Without Compacting

Align Drip Emitters

混植・間作・リレー栽培の時間差設計

コンテナ・不織布ポット・ベランダ菜園の株数

5-Gallon Bucket / Pot

10-Gallon Fabric Grow Bag

20-Gallon Smart Pot

Window & Railing Boxes

混植・間作・リレー栽培の時間差設計

日当たり・風通し・根の深さのバランス

Canopy Airflow & Disease Prevention

Solar Geometry & North-South Orientation

Root Architecture & Soil Stratification

地域や気候に合わせた株間の調整

High Humidity & Lower Solar Flux

Arid Heat & High Evaporation

Short Growing Seasons (Zones 3–5)

Heavy Summer Rains & Blight

Metric vs. Imperial Quick Distance Guide

すじまき・点まき vs. 定植株間 vs. ニンニク・球根

1. Sowing Density vs. Final Stand

2. Garlic & Shallot Cloves

3. Spring Bulbs (Tulips & Daffodils)

1.2×2.4 m レイズドベッドの予想収穫量

株間計算の数学的計算式と具体例

Square and Rectangular Layout Count

Triangular Spacing Formula

Plants Per Square Foot, Square Metre & Reverse Density

Plant Spacing for Different Garden Shapes

Square and Rectangular Beds

Rows, Hedges, and Borders

Circular and Triangular Flower Beds

Irregular Beds, Paths, and Obstacles

Vegetable Gardens, Raised Beds, and Square Foot Gardening

1, 4, 9, and 16 Plants Per Square Foot

Crop-Specific Spacing and Planting Systems

Mixed Beds, Trellised Plants, and Row Access

Landscape, Groundcover, Native Plant, and Perennial Spacing

Planting Plugs and Landscape Flats

On-Centre Spacing for Groundcover Coverage

Shrubs, Hedges, and Privacy Screens

Native Plant Garden Layouts

Tree, Orchard, and Field Plant Spacing

Fruit Tree and Rootstock Considerations

Plants Per Acre and Hectare

Corn and Other Row-Crop Spacing

How Many Plants Should I Buy?

Add a Replacement Allowance

Packs, Flats, Trays, and Establishment Rates

Estimate Total Plant Costs

作物別推奨株間・条間一覧表