The easiest vegetables are the ones you harvest before anything has time to go wrong. Radishes are ready in three to four weeks, lettuce in about a month if you cut leaves rather than waiting for a head, and neither needs staking, pollination or pest management. The hardest common crops are the ones people start with — tomatoes, peppers and cauliflower — because they occupy a bed for three or four months and offer that entire window for something to fail.
That is the whole ranking principle below: time in the ground, and how many things have to go right.
The ranking
| Crop | Days to harvest | Sun needed | Spacing | Main risk |
|---|---|---|---|---|
| Radish | 22–30 | 4–6 hrs | 2 in / 5 cm | Woody if left too long |
| Lettuce (cut-and-come-again) | 30–45 | 4–6 hrs | 6 in / 15 cm | Bolts in heat |
| Rocket / arugula | 30–40 | 4–6 hrs | 4 in / 10 cm | Bolts in heat |
| Spinach | 35–45 | 4–6 hrs | 4 in / 10 cm | Bolts in heat |
| Bush beans | 50–60 | 6+ hrs | 4 in / 10 cm | Rot if sown in cold soil |
| Kale / chard | 50–60 | 4–6 hrs | 10 in / 25 cm | Aphids |
| Spring onions | 60–70 | 5+ hrs | 1 in / 2.5 cm | Almost none |
| Courgette / zucchini | 50–60 | 6+ hrs | 24 in / 60 cm | Takes over the bed |
| Beetroot | 50–70 | 5+ hrs | 3 in / 8 cm | Needs thinning |
| Carrots | 70–80 | 6+ hrs | 2 in / 5 cm | Forks in stony soil |
| Potatoes | 90–120 | 6+ hrs | 12 in / 30 cm | Bulky, but forgiving |
| Peas | 60–70 | 5+ hrs | 2 in / 5 cm | Needs support |
Start with these four
Radishes are the fastest reward in vegetable growing. Sow direct, thin to an inch or two, pull in three to four weeks. Their real value is as a diagnostic: if radishes fail, something is wrong with your soil or light, and you have found out in a month rather than a season.
Cut-and-come-again lettuce means sowing thickly and cutting the outer leaves rather than waiting for a heart to form. You get the first harvest in around four weeks and keep cutting for weeks after. It also tolerates less sun than most crops, which makes it viable in places a tomato would sulk.
Bush beans need no support, fix their own nitrogen, and crop heavily. The one rule is not to sow into cold soil — they rot rather than germinate. Wait until the soil is genuinely warm.
Courgettes are almost impossible to kill and famously over-produce. One or two plants is plenty. Their difficulty is spatial rather than horticultural: they sprawl over a metre in every direction.
What should beginners not start with?
Not because they are impossible, but because the failure comes late, after months of work.
- Tomatoes need staking, consistent watering, feeding, and are prone to blight and blossom end rot. Everyone starts with them; many are disappointed.
- Cauliflower requires steady conditions for months and reacts to any check in growth by producing a tiny head or none at all.
- Sweetcorn must be planted in a block for wind pollination and takes a lot of space for one or two cobs per plant.
- Melons and pumpkins need heat, length of season, and a great deal of room.
Grow them in year two, when your soil is better and you have a feel for watering.
How much sun do vegetables actually need?
Most vegetables want six or more hours. But requirements split fairly cleanly by what part of the plant you eat:
- Leaves (lettuce, spinach, kale, chard, rocket) — 4 to 6 hours is enough.
- Roots (radish, beetroot, carrot) — around 6 hours; less produces smaller roots, not failure.
- Fruit (tomato, pepper, courgette, cucumber, beans) — 8 hours or more, because the plant has to power flowering and fruiting.
If your plot is shady, our guide to vegetables that grow in shade covers what actually produces on three to six hours.
Two things that matter more than crop choice
Soil. Almost every beginner problem traces back to poor, compacted or hungry soil. Working in compost before planting does more for results than any variety choice — and if you are not making it yet, our beginner’s composting guide covers starting a heap from kitchen scraps.
Watering consistency. Irregular watering causes split roots, bitter lettuce, and blossom end rot on tomatoes. A deep soak twice a week beats a light sprinkle daily, because it encourages roots downward instead of holding them at the surface. Mulch holds that moisture in — it is the single highest-return thing you can do in the first season.
Sow little and often
The classic beginner error is sowing an entire packet of lettuce on one Saturday and facing forty lettuces in the same fortnight. Sow a short row every two to three weeks instead. Same seed, same effort, harvest spread across months.