s4ag-seasons

name	s4ag-seasons
description	Seasonal and annual farm planning. Use when the user asks about crop rotation, succession planting, what to do next, planning the year, when to sow or plant, planning a market garden calendar, livestock seasonal tasks, or says 'what should I be doing now', 'how do I plan my year', or 'I need a growing calendar'.
allowed-tools	["Read"]

Seasons & Planning

A farm runs on rhythm. The planning tool that removes the most stress and prevents the most mistakes is a calendar — not a sophisticated one, but one that actually covers the whole year and gets used. This skill builds that calendar and keeps it honest: living roots in the ground as much of the year as possible, gaps covered, and the soil never left bare.

How this skill works: A calendar built for the wrong climate or the wrong crops is worse than useless — it puts seed in cold ground and harvests into a glut. Each sub-tool pauses at a Checkpoint to confirm what it's assuming — your climate zone, your crops, your market, your hemisphere — before producing a plan. Confirm the checkpoint; the default tables below are Northern-Hemisphere temperate and must be adjusted. Each sub-tool ends with Next steps — the skills worth running once the calendar is in place.

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Expert Lineage

The thinkers whose frameworks underpin this skill — and what they specifically discovered that changes how you farm.

Jean-Martin Fortier — The Market Garden Production Calendar Fortier's The Market Gardener introduced the production calendar as the primary management tool for the small-scale intensive farm. His specific contribution: the discipline of tracking sellout rates at each market date — what sold, what was left over, in what quantities — and using that data to refine the planting calendar the following year. He demonstrated that a micro-farm of 1.5 acres could generate a six-figure income through precise succession planning and variety selection. The calendar is not a static plan but a living document that improves each year through systematic recording.

Eliot Coleman — Four-Season Production Coleman's work in Maine (Zone 5) showed that year-round production without artificial heating is possible in cold climates if the calendar is built around two key dates: the "killing freeze" (sustained below -10°C) and the days-to-maturity of overwintering crops. His insight: sow overwintering crops 6–8 weeks before the killing freeze — they grow to a size that can sustain through winter dormancy and resume growth in spring while competitors are still waiting to sow. The winter harvest extends the income-generating calendar by 3–4 months without heating infrastructure.

Joel Salatin — Diversified Farm Operations Calendar Salatin's polyface system demonstrated how different farm enterprises have complementary seasonal profiles: the enterprises that are labour-intensive in spring are low-maintenance in summer, and vice versa. His calendar insight: plan the whole farm's labour demands together, not enterprise by enterprise. Stack enterprises so peak demands don't coincide. The chicken tractor behind the cattle — following on clean pasture — is a calendar decision as much as a production decision.

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Which tool fits

You need to...	Tool
Build a month-by-month crop sowing and harvest calendar	crop-calendar
Design a crop rotation for soil health and pest management	rotation-planning
Plan key livestock tasks through the year	livestock-calendar
Schedule succession plantings for continuous harvest	succession-planning
Review the season and improve next year's plan	annual-review

Routing Decision

• Need to know what to do this month → crop-calendar
• Planning a rotation for the coming season → rotation-planning
• Managing livestock, need a seasonal task schedule → livestock-calendar
• Want to stop having too much or too little at once → succession-planning
• End of season, reviewing what to change → annual-review

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Crop Calendar

Month-by-month sowing, planting, and harvest schedule for temperate climates.

Ask: what climate zone is the user in? What crops are in the system? Primary purpose — market, household, or mixed? The calendar below is set for Northern Hemisphere temperate (UK/Northern Europe, US/Canada zones 5–7). Adjust timing by 4–6 weeks later for zone 4 or colder, and 2–4 weeks earlier for warmer maritime climates.

Soil health principle: every month that shows no crop in ground is a potential bare soil period. Flag these months and suggest a cover crop. Living roots year-round is the target — deviations are acknowledged but always explained.

Month	Sow Indoors	Plant Out	Direct Sow	Harvest	Cover Crop Window
Jan	Onions, leeks, celeriac	—	—	Stored roots, leeks, kale, sprouts	Existing winter covers in place
Feb	Peppers, aubergine, celery, early tomatoes	—	—	Leeks, stored veg, overwintered salad	Existing winter covers
Mar	Tomatoes, brassicas, lettuce, courgette, squash	Overwintered onions; early salad under cover	Peas, broad beans, spinach, carrots (late Mar)	Leeks, purple sprouting, overwintered salad	Winter covers terminating — sow spring mix in gaps
Apr	Squash, cucumbers, basil, celery	Lettuce (early); brassica transplants	Carrots, beetroot, salad, radish, Swiss chard	Asparagus, early salad, radish	—
May	—	Tomatoes (after last frost); courgette; squash; French beans	Beans, sweetcorn, salad successions, beetroot	Asparagus, salad, broad beans, first peas	—
Jun	—	Leeks, brassica transplants	Beetroot, carrots, salad, chard, fennel	Peas, salad, early potatoes, garlic (late)	Buckwheat in any early harvest gaps
Jul	Autumn brassicas; overwintering onions	—	Autumn salad, beetroot, chard, spinach	Potatoes, garlic, onions, salad, courgette, beans	Buckwheat or phacelia in harvest gaps
Aug	—	Autumn salad, brassicas (overwintering)	Oriental leaves, spinach, land cress, lamb's lettuce	Tomatoes, courgette, beans, peppers, squash	Phacelia, buckwheat in cleared ground
Sep	Overwintering lettuce	Overwintering salad; spring onions (covered)	Winter salad, land cress, corn salad	Squash, beans, tomatoes (last); brassicas	CRITICAL: sow winter cover crops in all cleared ground
Oct	—

Note on September–October: This is the most critical cover crop window of the year. Every bed cleared of a summer crop has a narrow window before soil temperatures drop below cover crop germination threshold (~7°C for rye and vetch). Miss this window and bare soil persists until March — five months of biological dormancy.

Checkpoint — confirm before finalising:

• What climate zone / region and hemisphere? The table above is Northern-Hemisphere temperate (UK / zones 5–7) — Southern Hemisphere shifts six months; warmer or colder zones shift weeks.
• What's the last and first frost date for the site? Everything keys off these two dates.
• Market, household, or mixed — and which crops actually matter to the user?

Confirm zone and frost dates before filling the calendar — sowing dates that are weeks off will cost a whole crop.

Output:

CROP CALENDAR — [Farm name / Year]

ZONE ADJUSTMENT: [note any adjustment from base UK/zone 6 timing]

MONTH | SOW INDOORS | PLANT OUT | DIRECT SOW | HARVEST | COVER CROP
Jan   |             |           |            |         |
Feb   |             |           |            |         |
Mar   |             |           |            |         |
Apr   |             |           |            |         |
May   |             |           |            |         |
Jun   |             |           |            |         |
Jul   |             |           |            |         |
Aug   |             |           |            |         |
Sep   |             |           |            |         |
Oct   |             |           |            |         |
Nov   |             |           |            |         |
Dec   |             |           |            |         |

BARE SOIL MONTHS (if any): [list] — cover crop solution: [species]

Next steps:

• Run rotation-planning (within this skill) so the calendar respects family rotation and fertility flow.
• Run succession-planning (within this skill) for any crop you want a continuous supply of.
• /s4ag-soil and /s4ag-vegetables — execute the cover-crop and crop-specific decisions the calendar flags.

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Rotation Planning

Designs a crop rotation that breaks pest cycles, balances fertility, and maintains soil biology.

The three jobs a rotation does:

1. Breaks pest and disease cycles — soil-borne pathogens (clubroot, allium white rot, nematodes) build up when the same family returns too quickly. Minimum 3 years between same family on same ground; 5–7 years for persistent problems.
2. Balances fertility demand — heavy feeders follow legumes or composted ground; light feeders follow heavy feeders; soil-restoring crops (green manures, roots) come before the heaviest feeders.
3. Manages the food web — different crop roots feed different microbial communities. Rotating families cycles the food web through diversity rather than monoculturing it.

Standard 4-bed rotation (temperate market garden):

The four crop families to rotate: Brassicas (heavy feeders, clubroot risk), Alliums + salad (light feeders), Roots (carrots, parsnips, beet — no fresh compost or they fork), Legumes/potatoes (nitrogen-fixing or disease break).

Year	Bed 1	Bed 2	Bed 3	Bed 4
Year 1	Brassicas (heavy feeders)	Alliums + salad (light feeders)	Roots (no compost)	Legumes + potatoes (break crop)
Year 2	Legumes + potatoes	Brassicas	Alliums + salad	Roots
Year 3	Roots	Legumes + potatoes	Brassicas	Alliums + salad
Year 4	Alliums + salad	Roots	Legumes + potatoes	Brassicas

Extended 6-bed rotation (adds dedicated soil-building and cover crop years):

For larger systems: add Cucurbits (courgette, squash, cucumber — heavy feeders, different family) and a dedicated green manure/restoration year. This extends to a 6-bed rotation with better pest pressure management and more biological recovery time between high-demand crops.

Rotation planning rules:

• Never follow brassicas with brassicas on the same ground within 3 years.
• Don't apply fresh compost before root crops (parsnip, carrot, parsley root) — they fork.
• Potatoes and tomatoes are both Solanaceae — don't follow one with the other.
• Legumes fix nitrogen only if nodulated — inoculate seed in new ground.

Checkpoint — confirm before finalising:

• How many beds or fields, and what crops/families does the user actually grow? The standard 4-bed model may not map to their crops.
• Any known soil-borne disease history (clubroot, white rot, eelworm)? These lengthen the required rotation gap.
• Are perennials or livestock part of the system — meaning the rotation needs to account for them?

Confirm bed count and crop families before drawing the rotation — a generic 4-bed plan won't fit a farm growing six families.

Output:

ROTATION PLAN — [number]-bed system

OVERVIEW TABLE:
[Year × Bed matrix as above]

PEST AND DISEASE BREAKS:
- Clubroot: Brassicas return to each bed every [X] years
- Allium white rot: Alliums return every [X] years
- [other specific concerns]

FERTILITY FLOW:
- Compost applied before: [crops]
- Nitrogen credit from legumes credited to: [following crop]

COVER CROP IN ROTATION:
- [which beds, which months, which species]

Next steps:

• /s4ag-soil — match the fertility plan to the rotation's heavy-feeder and legume slots.
• /s4ag-pests — use the rotation deliberately to break the pest and disease cycles it's designed for.
• Run crop-calendar (within this skill) to translate the rotation into month-by-month actions.

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Livestock Calendar

Key seasonal tasks for farm animals, month by month.

Ask: what species are in the system? What's the production objective — dairy, meat, fibre, eggs, land management? The calendar below covers cattle, sheep, pigs, and poultry. Select the relevant sections.

General principle (Savory): the livestock calendar is subordinate to the grazing plan. Breeding, weaning, and housing dates should be set to align the period of highest animal nutritional demand with the period of peak grass growth — spring and early summer in temperate climates.

Month	Cattle	Sheep	Pigs	Poultry (layers)
Jan	Winter housing; monitor body condition; check hay quality and stocks	Pregnancy scanning; supplementary feed if needed; foot inspections	Indoor; monitor condition; fresh bedding management	Low production; supplement light to 16 hrs/day to maintain production
Feb	Monitor close-calving cows; prepare calving area; navel dipping supplies	Ewes approaching lambing (early breeds); prepare lambing area	—	Continue light supplementation
Mar	Main calving (spring calvers); check colostrum; calf health monitoring	Peak lambing; intensive monitoring; colostrum management; hypothermia kit ready	Begin outdoor rotation if soil allows	Broiler season begins; layer production rising with day length
Apr	Turn-out after calving; check soil conditions before turnout to avoid poaching	Turn out with lambs; assess grass covers; adjust stocking rate	Begin outdoor rotation; move every 1–2 weeks	Layers on spring grass flush; production peaks
May	Grazing rotation begins; monitor grass cover weekly; first parasite monitoring	FAMACHA eyelid scoring starts; first worm risk; adjust rotation	Active rotation on 3+ paddocks; monitor ground recovery	Broiler batches processing; eggs in full production
Jun	First silage cut (if applicable); body condition scoring	Shearing; dag before shearing to prevent flystrike; weigh lambs	Rotate 2-week cycles; monitor rooting impact and vegetation recovery	Peak egg production; provide shade and water
Jul	Monitor for summer mastitis (dry cows); fly control; continue rotation	Weaning; sort lambs for sale vs. keep; worm burden assessment	Wallow provision essential in heat; rotate as usual	Heat management critical; egg quality may drop in high heat
Aug	Body condition score before weaning; assess cows for next breeding	Pre-mating nutrition for ewes; flush thin ewes; foot trimming	Finishing animals — assess condition; book abattoir	Moult preparation in second-year hens

Checkpoint — confirm before finalising:

• Which species, which breeds, and what's the production objective (dairy, meat, fibre, eggs, land management)?
• What hemisphere and climate? Breeding and turn-out dates anchor to local grass growth and season.
• Spring or autumn block calving/lambing, or year-round? The whole calendar pivots on this.

Confirm species, objective, and calving/lambing pattern before laying out the year — the table covers four species and only the relevant one applies.

Output:

LIVESTOCK CALENDAR — [Species / Breed]

CRITICAL DATES:
Breeding/mating: [month]
Birth/lambing/farrowing: [month]
Weaning: [month]
Housing (in): [month]
Turn-out: [month]

MONTHLY TASKS:
[selected months with specific tasks for this farm]

GRAZING PLAN INTEGRATION:
Peak demand period: [month]
Peak grass growth: [month]
Alignment note: [whether these match or where the gap is]

Next steps:

• /s4ag-livestock — build the grazing plan this calendar's turn-out and rotation dates serve.
• /s4ag-fencing — the infrastructure that makes the rotational moves possible.
• The species skill — /s4ag-poultry, /s4ag-pigs, /s4ag-goats — for husbandry detail on each task.

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Succession Planning

Calculates how many plantings are needed at what intervals to achieve continuous harvest.

The succession planning formula:

Planting interval = how often you want to harvest (in days) Number of plantings always in ground = days to maturity ÷ planting interval

This tells you how many beds/rows of that crop need to be at different stages simultaneously.

Worked example — lettuce:

• Days to maturity: 35 days (from transplant)
• Desired harvest interval: 7 days (weekly market)
• Plantings always in ground: 35 ÷ 7 = 5 plantings
• Sow one new tray every 7 days; at any point, 5 trays are at different stages

Week	Planting	Stage at week 5
Week 1	Sow tray A	Tray A ready to harvest
Week 2	Sow tray B	Tray B at 4 weeks
Week 3	Sow tray C	Tray C at 3 weeks
Week 4	Sow tray D	Tray D at 2 weeks
Week 5	Sow tray E	Tray E at 1 week; harvest tray A; sow tray F

Common succession intervals (temperate climate, summer production):

Crop	Days to maturity	Suggested planting interval	Notes
Lettuce (leaf)	28–35 days	7–10 days	Slow to bolt varieties extend harvest window
Radish	21–28 days	10–14 days	Short harvest window — succession essential
Salad mix (cut-and-come-again)	28–35 days	14–21 days	Multiple cuts possible
Spinach	40–50 days	14–21 days	Bolts quickly in heat — gap July/Aug
French beans	55–65 days	21 days	3 plantings covers the season
Courgette	50–60 days	21–28 days	One plant produces long — few plants needed
Kale (cut-and-come-again)	60–70 days	28 days	Autumn sown for winter harvest
Beetroot	50–60 days	14–21 days	Stores well so harvest window is flexible

Complications to plan for:

• Bolting: summer lettuce bolts in heat — switch to bolt-resistant varieties or pause succession July/August
• Glut vs. gap: if the market or household can't absorb more of something, extend the planting interval — don't just grow more
• Transplant vs. direct sow: transplanted crops allow 3–4 extra weeks of planning flexibility vs. direct-sown

Checkpoint — confirm before finalising:

• Which crop, and what's the target — a weekly market quantity, a steady household supply, or a single preserving glut?
• What's the realistic days-to-maturity in the user's climate? The figures below are temperate-summer and slow in cold or shoulder seasons.
• Can the market or household actually absorb continuous supply, or would fewer, larger plantings serve better?

Confirm the harvest target and local maturity time before calculating intervals — succession maths built on the wrong maturity figure produces gaps or gluts.

Output:

SUCCESSION PLAN — [Crop]

Target harvest volume: [amount per week/market date]
Days to maturity: [days from transplant / direct sow]
Planting interval: [days]
Number of plantings always in ground: [number]
Bed/row length per planting: [length]

SCHEDULE (first 8 weeks):
Week 1: Sow/plant [batch 1] → harvest [date]
Week 2: Sow/plant [batch 2] → harvest [date]
[continue]

GAPS TO WATCH:
- [month]: [potential glut or gap and how to manage it]

Next steps:

• Run crop-calendar (within this skill) to place every succession sowing date on the year plan.
• /s4ag-vegetables — variety choice (bolt-resistance, days to maturity) that makes succession work.
• /s4ag-market or /s4ag-direct-marketing — match planting volume to what the channel actually sells.

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Annual Review

Records what happened this season and turns observations into improvements for next year.

The annual review is the Fortier discipline: collect the data that makes next year's calendar more accurate. Do it at the end of the season when memory is fresh — November is ideal for a temperate growing system.

What to record:

1. Yield per bed or area How much did each bed or area produce, in kg or units? Which beds outperformed and which underperformed? This identifies whether the rotation, variety choice, or soil health is working.

2. Market performance What sold out first (undersupply)? What was left over most often (oversupply)? What was the most profitable per metre? This is the Fortier discipline — use sellout rates to shift the production calendar toward what sells.

3. Crop performance What grew well and what struggled? What failed entirely? Were failures due to weather, pests, soil, or timing errors? Separate these: weather failures are different from management failures.

4. Soil observations Earthworm count (>10 per spade dig = good); structure when digging (friable or compacted); colour change over the year. When was the last soil test? Schedule next one.

5. Labour record Which enterprises or tasks took significantly more or less labour than expected? Which crops have high labour-to-return ratios? This informs what to drop or simplify.

6. What to change Based on the above: what to grow more of, what to grow less of, what to stop entirely, what timing to shift, what rotation change to make.

Checkpoint — confirm before finalising:

• What records does the user actually have — yields, sales, labour notes, soil tests — versus what's from memory? Be clear which is which.
• Is this a genuine end-of-season review, or mid-season? Timing changes what's worth recording now.

Confirm what data exists before drawing conclusions — a review built on half-remembered figures will mislead next year's plan.

Output:

ANNUAL REVIEW — [Year]

WHAT WORKED WELL
- [crop/enterprise]: [why — yield, market, ease, soil response]

WHAT UNDERPERFORMED
- [crop/enterprise]: [why — pest, timing, variety, soil, market]

MARKET DATA
- Best sellers (undersupply — grow more): [list]
- Consistently left over (oversupply — grow less): [list]
- Best margin per metre: [crop]

SOIL HEALTH
- Earthworm counts: [better / same / worse than last year]
- Structure observations: [note]
- Soil test due: [yes/no — schedule date]
- Cover crop gaps this year: [months where bare soil occurred — plan to cover next year]

LABOUR
- More labour than expected: [task]
- Less labour than expected: [task]
- Enterprise to simplify or drop: [if any]

CHANGES FOR NEXT YEAR
1. [specific change]: [rationale]
2. [specific change]: [rationale]
3. [specific change]: [rationale]

NEXT SEASON CALENDAR ADJUSTMENTS
- Sow [crop] [X] weeks earlier/later
- Increase [crop] succession by [X] more plantings
- Drop [crop] from rotation

Next steps:

• Run crop-calendar and rotation-planning (within this skill) to fold the changes into next year's plan.
• /s4ag-finance — turn the margin-per-crop findings into enterprise-level budget decisions.
• /s4ag-soil — act on the soil observations; schedule the retest the review flagged.