SproutSmart
SproutSmart™ Intelligent Garden Sowing

Grand Rapids

Lettuce
Zone 11a Save Garden

Planting Schedule

Add Grand Rapids to your garden to build a schedule and get reminders.
Botanical illustration of Grand Rapids
45d to harvest

Sweet, crisp leaves with a cool, refreshing crunch—Grand Rapids loose-leaf lettuce forms tender, bright heads that feel silky at first touch and then snap cleanly with every bite. The flavor is pleasantly mild and sweet, making it an ideal centerpiece for fresh salads and quick tosses, while its delicate texture also shines in light, garden-fresh sauces and wraps. Fast to mature in about 45 days, it’s a dependable favorite for home gardeners who want reliable harvests and beautiful, edible greens all season long.

Crop Dates

Growing note: In frost-free Zone 11a, grow this cool-season crop during the cooler dry season (October–February).
MilestoneDate
Start Indoors—
ClimateFrost-Free Climate
Transplant / Sow OutdoorsOct 1st
Harvest BeginsNov 15th
Harvest EndsFeb 28th

Crop Details

TraitValue
Days to Maturity45
Sun RequirementsPart SunPartial sun
Growth HabitRosette
Support NeededNone
Planting DepthSurface
Germination Temp (°F)70
Min Soil Temp (°F)40
Min Night Temp (°F)35
Harden Off (days)6

Today's Conditions

Outdoor planting for Grand Rapids in Zone 11a typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Grand Rapids.

Garden Alerts

In frost-free Zone 11a, grow this cool-season crop during the cooler dry season (October–February).

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Frequently Asked Questions

What’s a common disease/pest problem for Lactuca sativa (Grand Rapids lettuce) and how do I control it?
Watch for aphids and slugs/snails on young lettuce, especially in warm, humid weather. Rinse aphids off with a strong stream of water, then spot-treat remaining clusters by wiping leaves with soapy water, and use slug traps or hand-pick at dusk to protect the tender plants. Keep the bed mulched lightly after seedlings establish and avoid wetting the foliage to reduce disease pressure.
How often should I water Lactuca sativa during the main growing phase?
During active leaf growth (roughly weeks 2–6), keep the soil consistently moist but not waterlogged—aim for about 1 inch (2.5 cm) per week, split into 2–3 waterings if it’s hot or windy. Lettuce is shallow-rooted, so let the top 1 inch (2–3 cm) dry slightly between waterings to prevent rot. If leaves start to feel limp or the plant tightens toward flowering, water more evenly.
Botanical illustration of Grand Rapids

Sweet, crisp leaves with a cool, refreshing crunch—Grand Rapids loose-leaf lettuce forms tender, bright heads that feel silky at first touch and then snap cleanly with every bite. The flavor is pleasantly mild and sweet, making it an ideal centerpiece for fresh salads and quick tosses, while its delicate texture also shines in light, garden-fresh sauces and wraps. Fast to mature in about 45 days, it’s a dependable favorite for home gardeners who want reliable harvests and beautiful, edible greens all season long.

Today's Conditions

Outdoor planting for Grand Rapids in Zone 11a typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Grand Rapids.

Garden Alerts

In frost-free Zone 11a, grow this cool-season crop during the cooler dry season (October–February).

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 40°F for reliable germination and early growth.

Expert Note

For Grand Rapids (fast early lettuce), transplant into consistently cool conditions and avoid heat—once nights warm, it can bolt quickly even if tipburn resistant.