Planning for Next Year: Evaluate, Order and Prepare

Planning for next year means you evaluate what worked, order seed early and prepare beds before the new season starts.

Plan next year’s garden by working backwards from your last spring frost date: review the season within weeks of the first autumn frost, finish the bed plan and seed order by midwinter, and schedule soil work for the first workable days of late winter. This guide covers what a journal should record, when to test soil, how to build a four-bed rotation, how to budget and store seed, and how to turn failures into specific changes.

Planning is the closing guide of the Seasonal Gardening guides. It picks up where Winter Garden Care leaves off, and its sowing dates come from the Seasonal Planting Calendar.

Planning at a glance

The example months assume a last spring frost in mid-April (roughly hardiness zones 6 to 7). Gardeners in zones 3 to 4, where the last frost is often late May, shift everything about 5 to 6 weeks later. Zones 9 to 10 shift 6 to 10 weeks earlier. In the Southern Hemisphere, flip the months by about six months: the review happens in May to June and the seed order in June to July.

Review what failed before you plan what to grow

A review that ends in “tomatoes did badly” changes nothing. Push each failure back to a cause you can act on, using four categories.

Look for repeats. A problem that appears in the same bed two years running is nearly always soil, site or a persisting disease, while a one-off is usually weather. If a disease struck, garden hygiene explains what to clear and what to leave. Also list the successes you want to scale up and the jobs that took more time than the harvest was worth. Dropping a crop you resent is a legitimate planning outcome.

Journal fields that earn their place

A journal fails when it’s too elaborate to keep up. A spreadsheet with one row per planting, or a notebook with one page per bed, is enough. Capture these fields.

• Sow date, transplant date, first harvest date, so you can calculate real days to harvest in your climate.
• Exact variety name, not “red tomato”. Varieties differ more than species do in earliness and disease resistance.
• Yield by weight or count per bed. Even a rough tally shows which crops pay for their space.
• First and last frost dates each year. After 3 to 5 years your own average beats any regional chart.
• Weather extremes: heatwave dates, hail, drought spells, late frosts.
• Problems with the date first noticed and what you did about it.
• One line of verdict: repeat, change or drop.

Photographing each bed on the first of every month gives you a visual record of gaps and crowding with almost no effort.

When to test your soil

Test soil when it’s workable but not saturated, and not within about 6 to 8 weeks of applying lime, fertiliser or a heavy compost dressing, because those skew the result. Autumn is the best window in cold climates: you get results while there’s still time to apply lime, which needs 2 to 3 months to shift pH noticeably. Late winter works too, as soon as the ground thaws and is no longer sticky. Avoid testing frozen or flooded soil.

1. Take 8 to 10 small cores from each bed to a spade depth of 15 to 20 cm (6 to 8 in), or 10 cm (4 in) for lawns.
2. Mix the cores in a clean plastic bucket and remove stones and roots.
3. Dry a cupful loosely at room temperature and send it to a lab, or use a kit.
4. Record pH, phosphorus, potassium and organic matter in the journal against the bed name.
5. Retest every 3 to 4 years, or yearly in beds you’re actively correcting.

Most vegetables do best between pH 6.0 and 7.0. Soil pH Explained covers correcting it, and a simple jar test or hand texture check can precede a paid lab test.

Build a four-bed crop rotation

Rotation breaks pest and disease cycles because many problems (clubroot in brassicas, white rot in onions, potato blight carry-over, soil nematodes) persist in soil for years. A family should return to the same bed only after 3 to 4 years, and 5 to 7 years where clubroot or white rot has struck.

Fruiting crops here means tomatoes, potatoes, peppers, aubergines and, in most plans, squash and sweetcorn. Brassicas follow legumes because they use the nitrogen left in the soil by the previous crop’s root nodules. Roots follow brassicas because they don’t want fresh nitrogen, which makes carrots fork. Leafy salads and herbs fit wherever there’s a gap, but keep lettuce out of the same bed as other daisy-family crops for a year if you have had lettuce root aphid or sclerotinia.

Budget and store seed

Work out quantities from the bed plan rather than from catalogue enthusiasm. Divide your row length by the spacing to get plant counts, then add 10 to 20% for losses. A typical packet of 25 to 50 tomato seeds covers a household many times over, while a packet of 200 carrot seeds covers about 4 to 6 m (13 to 20 ft) of sown row. Share packets of large-quantity crops with a neighbour.

For budgeting, rank the list into three tiers: crops where variety choice matters (tomatoes, peppers, brassicas, onions from seed), where cheap generic seed is fine (radish, beans, peas, marigolds), and where buying plants is cheaper than raising them (a single pot of a perennial herb). Check your leftovers first.

Store seed cool (ideally 5 to 10°C, or 41 to 50°F), dry and dark. Keep packets in a sealed jar with a sachet of silica gel or a spoonful of dry rice, and put the jar in a cupboard rather than a damp shed. A refrigerator works if the jar is sealed and allowed to warm to room temperature before opening, to prevent condensation. These are typical figures: viability varies by variety and storage, so germination testing is the real answer. Place 10 seeds on damp kitchen paper in a sealed bag at about 20°C (68°F) and count sprouts after 7 to 14 days. Seven or more means sow normally, four to six means sow roughly twice as thick, fewer than four means replace it. For sowing technique, see How to Plant Seeds Step by Step.

Sketch the plan and prepare ground

Draw each bed to scale on graph paper, mark sun and shade at midsummer, and write the rotation group in each. Mark the sowing dates for each crop against your frost dates, using the weeks-before and weeks-after rules on the packet. Then plan soil work: apply 2 to 5 cm (1 to 2 in) of finished compost in autumn or late winter, and cover bare beds with mulch or a cover crop to stop winter erosion.

Troubleshooting a plan that did not survive the season

How planning now improves next year’s harvest

Crop rotation prevents club root, blight and nematode build-up, so a plan that moves cabbage, tomato and bean each year protects the soil. A soil test shows ph and nutrients, and compost, lime or sulphur fixes shortfalls. Notes on sowing dates, frost and pest outbreaks help you time succession sowing of lettuce and radish.

Seed catalogues tempt you, so you’ll list what you ate and discard the rest. Saving seed from bean and pea suits open-pollinated varieties, while hybrid tomato seed doesn’t come true. A cold frame or polytunnel extends the growing season and protects spinach and kale through frost. What should you review first? Check which beds had disease, because blight and fusarium stay in soil, and move susceptible crops away. Your extension service offers planting calendars for your zone.

How planning for next year starts with notes, seed orders and bed prep

Tomato, pepper and bean notes show which varieties tolerate your summer, and a record of blight or aphid outbreaks helps you plan rotation. Rotation prevents club root in cabbage and kale, and it reduces nematode build up in potato beds. Compost feeds loam and improves clay, so you should order or make 5 cm per bed each year. Lettuce, spinach and pea need early sowing, and a seed order in December secures the best varieties. Mulch protects beds in winter and reduces weeds before spring. Onion, garlic and leek suit a bed that held beans, because beans fix nitrogen in loam. Lavender and rose need a pruning date in your calendar, and tulip and allium bulbs need an autumn slot. A sketch of beds shows where sun reaches, and shade from a maple or birch blocks crops. Your extension service and the rhs offer soil test advice. The succession planting guide helps you stagger sowings.

Mulch reduces weeds and protects beds of hosta and fern, and compost feeds tomato and improves clay. Pea and bean fix nitrogen and feed the next crop of cabbage, so plan 2 beds of 1.2 m width per crop family and rotate every 3 years.

Lavender needs sun, and rose needs feed in spring. Mulch protects tulip bulbs and reduces weeds.

Common mistakes

• Planning by month rather than frost date. A mid-May tomato date is a gamble in zone 4 and late in zone 9. Calculate from your own last frost, and keep a margin of one week.
• Ordering before checking stock. Leftover seed from last year goes in the test jar first; otherwise you pay twice for crops you already own.
• Testing soil right after liming or feeding. The result reflects the amendment, not the soil. Wait 6 to 8 weeks.
• Rotating only the vegetables you remember. Potatoes and tomatoes are the same family, so planting one after the other defeats the purpose.
• Keeping a journal too complicated to maintain. Five fields kept up beats twenty abandoned by June.
• Planning more beds than you can tend. Cut the plan to what you can weed and water in a 2 hour weekly session, and expand once it’s working.

Next steps

Put the plan into action with the Seasonal Planting Calendar, check the cold-weather jobs in Winter Garden Care, and see the month-by-month overview in The Gardener Year-Round Checklist. The full seasonal series is on the Seasonal Gardening guides.