Bright green, loose ruffled leaves of Ashbrook lettuce growing in soil.
Photo: DeFacto · CC BY-SA 4.0. Source caption: “Lactuca sativa 'Ashbrook' form”. Cropped for display. Re-encoded as WebP. Image adaptation available under CC BY-SA 4.0. Pictured: the loose-leaf cultivar Ashbrook. Salad Bowl is another leaf type used as an example in the shopping list; the photograph is not Salad Bowl.
Plant Care Steps · Growing guideplantcaresteps.com/plants/lettuce/

Vegetables · A patio or balcony in cool weather

Let’s grow
leaf lettuce.

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Lactuca sativa

This plan is for Loose-leaf lettuce picked young; not four mature heads

Light: Choose a bright spot; some afternoon shade helps as days warm.

Planting steps ↓

YOUR SIMPLE GROWING PLAN

One pot. Here’s the plan.

Before you start Sow during a cool spring or fall spell. Four plants at 6-inch spacing are for young-leaf picking; use a different plan for mature heads.

What you need · pot, mix & supplies
  • One 12-inch square planter, at least 8 inches deep
  • 8 loose-leaf lettuce seeds, such as Salad Bowl
  • Fresh potting mix, a gentle watering can, and scissors

The soil

Miracle-Gro Organic Potting Mix (US, with starter nutrients; check your bag for additional-feeding directions)

A patio or balcony in cool weather. Start with seeds.

THE POT12 × 12 × 8 in.

One draining square planter, at least 8 inches deep. This layout is for picking young leaves, not growing four full-size heads.

HOW MANY8 seeds → 4 plants

Four spots, 6 inches apart. Harvest young leaves, not big heads.

See the planting illustration
Illustrated starting setup: 12 × 12 × 8 in.; 8 seeds → 4 plants.
12 × 12 × 8 in. · 8 seeds → 4 plants One draining square planter, at least 8 inches deep. This layout is for picking young leaves, not growing four full-size heads. Four spots, 6 inches apart. Harvest young leaves, not big heads. Original illustration; not to scale.
  1. 01

    Wet the mix first

    Fill the planter, leaving 1 inch below the rim. Water until the mix is evenly damp.

  2. 02

    Sow four pairs

    Mark a 2 × 2 grid with spots 6 inches apart. Put 2 seeds at each spot and cover with ¼ inch of mix.

  3. 03

    Keep the surface from drying

    Check the seed layer daily and sprinkle gently as needed. At 3–4 true leaves, snip the weaker seedling at each spot instead of pulling on neighboring roots.

  4. 04

    Pick small, tender leaves

    Keep 4 plants. Take a few outer leaves at a time and leave the center growing. This close layout is for young-leaf harvests.

Other ways to start
Buy small nursery starts+

Plant 4 loose-leaf lettuce starts at the same four spots, with their root balls at the existing soil level. Choose individual young plants rather than squeezing a whole crowded nursery cell into each spot.

YOUR EVERYDAY ROUTINE

Water & fertilizer at a glance.

Water when
Keep the seeded layer lightly moist. Once rooted, water when the surface starts drying; wet the deeper mix and let excess drain. Empty the saucer or outer pot after draining.
Fertilizer
Miracle-Gro Water Soluble All Purpose Plant Food (US 24-8-16)
Amount
1 tablespoon in 1 US gallon of water
What that amount covers
Mix into water. Apply only enough solution to wet this pot and drain; the mixing batch is not the amount to pour on.
How often to feed
Only when additional feeding is due: every 14 days during active growth. Stop at harvest or when growth finishes.
When to start or pause
Check your potting-mix bag before adding food. Fresh enriched mix may cover a short crop; do not stack full-rate feeds.
Product directions ↗

Use level measures and the exact US formula shown. If your label differs, follow it; do not transfer this dose to another formula or combine feeding programs.

See the watering & feeding illustrations
A soil check followed by slow root watering and free drainage.
Check before watering. Keep the seeded layer lightly moist. Once rooted, water when the surface starts drying; wet the deeper mix and let excess drain. Original illustration; not to scale.
Fertilizer measure for Leaf lettuce: 1 tablespoon in 1 US gallon of water. Mix into water. Apply only enough solution to wet this pot and drain; the mixing batch is not the amount to pour on.
1 tablespoon in 1 US gallon of water Mix into water. Apply only enough solution to wet this pot and drain; the mixing batch is not the amount to pour on. Only when additional feeding is due: every 14 days during active growth. Stop at harvest or when growth finishes. Check your potting-mix bag before adding food. Fresh enriched mix may cover a short crop; do not stack full-rate feeds. Original illustration; not to scale.
Illustrated reference for Miracle-Gro Water Soluble All Purpose, US 24-8-16; not actual packaging.

US PRODUCT REFERENCE

Miracle-Gro

Water Soluble All Purpose

24-8-16

Soluble: mix into water

Check the official US product ↗

Illustrated reference; check the manufacturer’s current packaging and US label.

When to start picking leaves
03 / WHAT HAPPENS NEXT

Begin taking leaves when they are large enough to use, leaving plenty behind. Cool conditions and the seed variety affect the pace; a packet’s baby-leaf estimate is more useful here than its full-head harvest date.

Choose a cool sowing window

Start in a cool spring or fall spell. Hot weather makes a fresh batch harder to establish and encourages flowering. Local planting windows matter more than a single month for the whole US.

For regional planting windows, find your local Cooperative Extension office ↗.

Something looking off?

Why does the lettuce taste bitter?+

Heat and flowering can turn lettuce bitter. If the plant sends up a tall flowering stem, finish the crop and start again in cooler weather.

Can I grow four iceberg heads in this pot?+

This recipe is for loose-leaf lettuce picked young. Full-size lettuce plants need more space; use a separate plan for iceberg or full-size romaine.

Why are the seeds not coming up in warm weather?+

Hot mix can slow or prevent germination. Utah State gives 55–65°F as a useful germination range and notes reduced germination above 80°F. Check the seed-layer moisture and packet, then try a fresh sowing in a cooler spell. More fertilizer will not make a hot seedbed suitable.

Spacing seedlings and starting the next crop
Space four plants for young leaves

Four marked positions make sowing and thinning easy to follow. The 6-inch spacing is our container adaptation of young-leaf guidance, not a promise that four large, mature lettuces will fit.

Start a second pot for a later harvest

If you enjoy your first harvest, start another small pot while the first is still producing. Keep each sowing labeled so you know which crop is young and which is nearly finished.

Help with your next step.

Sources, dates & detailed PDF

Editorial plans, not results from a Plant Care Steps growing trial. Compiled with AI assistance; they have not yet had an independent horticultural review. Editorial approach.

Something needs updating? Suggest a correction

Published · Updated

By jennyzhuang

Sources checked View sources ↗

Detailed PDF ↓

Full reference edition with expanded explanations and illustrations. Its publication dates appear in the file.

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Soil: Miracle-Gro Organic Potting Mix (US, with starter nutrients; check your bag for additional-feeding directions)

By jennyzhuang

Sources checked View sources ↗

Published · Updated

Read the online Sources section for linked references and the full reference PDF.

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Plant Care Steps · Care card

Leaf lettuce

Lactuca sativa

Water
Keep the seeded layer lightly moist. Once rooted, water when the surface starts drying; wet the deeper mix and let excess drain.
Light
Sun or light shade. Choose a bright spot; some afternoon shade helps as days warm.
Temperature
Cool weather. A patio or balcony in cool weather
Common problems
Why does the lettuce taste bitter. Heat and flowering can turn lettuce bitter. If the plant sends up a tall flowering stem, finish the crop and start again in cooler weather.