Selection Guide

How to Choose Vegetables for Bag Growing

Not all vegetables are equally suited to container gardening in plastic bags. The most reliable choices are varieties that have a compact root structure, a moderate water requirement, and a growth habit that fits within the space provided by a standard grow bag.

The sections below group vegetables by type, with notes on bag size, light requirements, and typical time from planting to first harvest.

Several heads of lettuce growing in green plastic bags on a balcony
Lettuce varieties are well-suited to smaller bags and partial shade
Spinach, kale, and zucchini growing side by side in plastic bags
Spinach, kale, and zucchini can grow together in a single row of bags

Leafy Greens

Leafy greens are among the most practical choices for bag gardening. They grow quickly, tolerate partial shade, and can be harvested in stages — allowing the same plant to produce over several weeks.

Vegetable Bag Size Sun Days to Harvest
Lettuce (loose-leaf) 15 L 4–6 hours 30–45 days
Spinach 15 L 4–6 hours 40–50 days
Kale 20 L 5–6 hours 55–70 days
Bok choy / Pak choi 15 L 4–6 hours 35–50 days
Swiss chard 20 L 5–7 hours 50–60 days
Tip — Successive Planting

Sow new lettuce or spinach seeds every two to three weeks to maintain a continuous supply rather than a single large harvest.

Fruiting Vegetables

Fruiting vegetables — those that produce an edible fruit — generally require more space, more sunlight, and more nutrients than leafy greens. They are well-suited to larger bags placed in locations that receive full sun for most of the day.

Eggplant plants bearing deep purple fruit in large plastic grow bags
Eggplants produce well in 25–30 L bags with full sun exposure
Vegetable Bag Size Sun Days to Harvest
Tomato (compact/dwarf) 20–30 L 6–8 hours 60–80 days
Pepper (bell or chilli) 20–25 L 6–8 hours 70–90 days
Eggplant / Aubergine 25–30 L 6–8 hours 70–85 days
Cucumber (bush type) 20–25 L 6–8 hours 50–65 days
Zucchini / Courgette 25–30 L 6–8 hours 50–60 days

Root Vegetables

Root vegetables can be grown in bags provided the bag is deep enough for the roots to develop without restriction. Shallow-rooted varieties such as radishes and short-variety carrots are the most practical options.

Vegetable Bag Depth Sun Days to Harvest
Radish 20 cm minimum 4–6 hours 22–30 days
Carrot (short variety) 30 cm minimum 5–7 hours 60–80 days
Beetroot 25 cm minimum 5–7 hours 55–70 days
Spring onion / Scallion 15 cm minimum 4–6 hours 60–80 days

Herbs

Many culinary herbs are compact and well-adapted to bag growing. They generally require less soil volume than vegetables and can be placed on windowsills or small outdoor ledges.

  • Basil: Warm temperatures, full sun, harvest frequently to prevent flowering
  • Parsley: Tolerates partial shade, slow to establish from seed
  • Chives: Hardy and low-maintenance, suitable for 10–15 L bags
  • Coriander / Cilantro: Prefers cooler temperatures; bolts quickly in heat
  • Mint: Grows vigorously — keep in its own bag to prevent spreading
Variety Selection Note

When purchasing seeds or seedlings, look for descriptions such as "compact", "dwarf", "bush type", or "container variety". These cultivars are specifically developed for smaller growing environments and generally perform better in bags than standard field varieties.

Vegetables to Avoid in Bags

Some vegetables are not well-suited to bag growing due to their size, deep root systems, or space requirements. These include:

  • Corn / Maize — requires large open space and wind pollination
  • Standard pumpkins or large squash — vines and fruit size are too large
  • Asparagus — perennial; needs permanent in-ground installation
  • Artichoke — large plant size unsuitable for typical bag volumes
  • Long-variety carrots — require more soil depth than bags usually allow

For next steps on planting and sowing, see the Seed to Harvest guide. For information on soil preparation, visit the Soil & Nutrients page.