Zone 13 is the hottest USDA zone and the only one that is frost-free year-round, with average winter lows above 60°F. There is no last spring frost and no first autumn frost to plan around, so in Zone 13 you plant by heat and by the wet and dry seasons, not by frost. The limits on what grows are heat, humidity, rain and pests rather than cold. All numbers below are published ranges, not promises for your garden: check your local extension service before you plant.
Shallots are the cook's onion: milder, sweeter and finer-textured than a bulb onion, and each planted set multiplies into a cluster of new bulbs. In Zone 13 they are a cool-season crop, planted as sets in the coolest months so the bulbs can size up before heat arrives. Plant them in summer and you will get green tops and tiny bulbs; plant them in the cool season and the clusters fill out properly.
Zone 13 timing for shallots
The table below is the whole plan in one place.
| Step | Zone 13 timing |
|---|---|
| Average winter low | Above 60°F |
| Last spring frost | None — frost-free year-round |
| First autumn frost | None — frost-free year-round |
| Best planting window | Coolest months only, roughly November to February |
| Start indoors | Not needed — sow direct where plants will grow |
| Direct sow outdoors | Sow direct the coolest months, roughly November to February |
| Days to germination | 7–14 days |
| Days to maturity | 90–120 days |
| Cold tolerance | hardy |
When to sow shallots in Zone 13
Plant shallot sets in the coolest months, roughly November to February, when the weather is at its mildest. Sets planted at the start of the cool season have the longest run before heat returns, which is what builds bulb size. Avoid planting in the hot wet months, when sets are more likely to rot in warm, soggy soil than to grow.
Starting shallots: indoors or direct sowing
Shallots are direct-sown as sets rather than grown from seed in most gardens: push each small bulb into prepared soil with the tip just showing, pointed end up. Space them carefully, because each set becomes a cluster that needs room to spread. Keep the bed weed-free from the start, because shallots have shallow roots and hate competition. Use the seed spacing calculator to plan your rows before you sow.
Soil, spacing and sun
Shallots needs full sun. Space plants 6–8 inches apart — crowded plants compete for light, water and air, and disease spreads faster between touching leaves in humid tropical air. Shallots want loose, well-drained soil that never stays soggy, with a pH in the range given in the table below. Heavy, wet soil is the main cause of failure in the tropics, so raise the bed or add compost and coarse organic matter to improve drainage. Feed lightly: too much nitrogen grows leafy tops at the expense of bulbs.
Watering shallots in Zone 13
Water needs are moderate. Water evenly while bulbs are forming, then ease off as the tops begin to yellow and fall over — that is the plant telling you it is finishing. Wet soil at harvest time invites rot, so if heavy rain is forecast near harvest, lift the bulbs a little early rather than leaving them to sit in mud.
Companion plants
Good companions for shallots include marigolds, basil, onions, lettuce. These are the companions listed for this crop in standard horticultural references: they share similar needs, and some, like marigolds, are traditionally planted to help confuse or deter pests. Plant companions in the same bed or nearby, not in a separate corner of the garden, so they actually share the space. Avoid planting heavy feeders that will compete for the same nutrients in the same spot.
Common pests and problems
The pests to watch for are aphids, slugs and cutworms. Slugs are the main worry in humid weather, so keep the bed tidy and avoid thick mulch right against the bulbs. Aphids can be washed off, and cutworm collars protect young sets. Good drainage is also pest control in disguise: bulbs sitting in wet soil rot, and rot attracts more trouble.
Harvest and storage
Harvest when the tops yellow and fall over, usually three to four months after planting. Lift the clusters gently with a fork, brush off the soil, and cure them in a dry, airy, shaded spot for a week or two until the skins are papery. Store cured shallots in a cool, dry place in a mesh bag — never in a sealed container, and never in the refrigerator, where damp causes sprouting. Use the harvest date calculator to work out a harvest window from your sowing date.
Succession and rotation in Zone 13
Succession sowing works in Zone 13, but only inside the cool season: sow a small batch every two to three weeks while the weather stays mild, so the harvest stretches out instead of arriving all at once. Once heat builds, stop sowing — a late batch will bolt before it is worth picking. Rotate crops so shallots does not follow another Amaryllidaceae family crop in the same bed next season. Keep notes on what you sowed and when: in a climate with no frost dates, your own records are the most useful planting guide you will have for the next cool season.
Related Zone 13 guides
More Zone 13 guides: Scallions in Zone 13 and the same crop in a cooler zone, Shallots in Zone 11. The January in Zone 13 guide shows what else to plant in that month, and the planting calendar hub brings all the Zone 13 guides together.
Frequently asked questions
When should I plant shallots in Zone 13?
Sow shallots in the coolest months, roughly November to February. Zone 13 is frost-free with winter lows above 60°F, so there is no last or first frost date to work from — plant by the cool season, not by frost. Check your local extension service for the best sowing weeks in your area.
Should I grow shallots from seed or sets in Zone 13?
Sets are the reliable choice: they are faster, more predictable, and far less likely to fail in warm soil. Seed-grown shallots need a long, cool run that Zone 13 rarely offers, so save seed for cooler climates and plant sets here.
Why are my shallots small?
Usually one of three things: planted too late in the cool season, so heat arrived before bulbs sized up; soil too poor or too wet; or planted too close together. Give each set its full spacing, plant at the start of the cool season, and feed lightly.
What soil and spacing do shallots need?
It needs full sun, soil pH 6.0–7.0, and spacing of 6–8 inches between plants. Work compost into the bed before planting and test the soil rather than guessing the pH.