Parsley in USDA Zone 13 is a cool-season herb grown in a frost-free tropical zone, and it needs the same honest framing as cilantro: it is a coolest-months crop, not a year-round one. Winter lows stay above 60°F, so there is no frost to kill it — the problem is heat, which slows growth, turns leaves tough and pushes the plant to bolt. Grown in the coolest months, roughly November through February, with steady water and a little shade, parsley is a generous, long-lived plant that can be picked leaf by leaf for months. Grown in the hot season, it struggles from the start.
Parsley has one famous quirk that Zone 13 gardeners should know about before they sow: it germinates slowly. Seed can take 14–28 days to appear, and many beginners assume the sowing failed and dig it up just as it was about to sprout. Patience is part of growing parsley, and so is keeping the seedbed moist for those long weeks — a board or damp cloth over the row helps, lifted the moment green shows.
Zone 13 at a glance
USDA Zone 13 is the hottest zone in the system, with average winter lows above 60°F, covering tropical places such as Puerto Rico, Hawaii and Guam. It is frost-free all year, so there is no last spring frost and no first autumn frost to plan around. Zone 13 has no frost dates to work from, so plant by heat and by the wet and dry seasons instead. These are zone averages, not promises for any one garden — check your local extension service.
| Detail | Zone 13 guidance |
|---|---|
| Winter low | Above 60°F |
| Frost | Frost-free year-round (no last or first frost dates) |
| Days to germination | 14–28 days |
| Days to maturity | 70–90 days |
| Sowing | both |
| Planting window | Coolest months, roughly November–February |
| Harvest | 70–90 days after sowing; pick outer leaves continuously |
| Sun | full sun |
| Soil pH | 6.0–7.0 |
| Spacing | 6–8 inches |
| Water needs | moderate |
| Cold tolerance | hardy |
When to plant parsley in Zone 13
Sow parsley in the coolest months, roughly November through February, so the long 70–90 days to maturity fall in the mildest weather. A November sowing is ready to start picking in January or February, and a well-cared-for plant keeps producing for months if it is picked regularly and kept watered. Sow a second batch a few weeks after the first to be sure of a continuous supply, but do not start parsley in the hot season — germination drops, growth stalls, and the plant bolts early. The planting calendar hub shows the Zone 13 year, and January in Zone 13 sits in the middle of the parsley window.
Starting parsley in Zone 13
Start parsley from seed direct in the bed or in trays for transplanting — it handles both, though direct sowing avoids disturbing the taproot. Sow seed shallowly, keep the seedbed evenly moist, and wait: germination takes 14–28 days, and the seedbed must not dry out in that time. Soaking seed overnight before sowing can speed things up a little, and a board or damp burlap over the row holds moisture until seedlings show. Thin seedlings to 6–8 inches apart once they are big enough to handle, and give young plants light shade in the hottest part of the day. Water gently so the seed is not washed away, and mark the row clearly so you do not weed out the slow seedlings by mistake.
Soil, spacing, sun and water
Parsley grows best in full sun in cooler zones, but in Zone 13 a spot with morning sun and afternoon shade gives better leaves and a longer season. It likes rich, well-drained soil with a pH of 6.0–7.0, and it rewards compost: dig in well-rotted compost before sowing and the plants will grow bigger and sweeter. Space plants 6–8 inches apart so air can move between them, using the plant spacing calculator to plan the bed. Parsley needs moderate water: steady, even moisture keeps leaves tender, and a plant that dries out turns tough and bolts sooner. Water at the base in the morning and mulch lightly to keep the soil cool and moist.
Companion planting
Good companions for parsley include tomatoes, peppers, marigolds and cabbage, and parsley is a useful edging plant at the front of a bed, where it is easy to pick and its scent is said to confuse some pests. Cilantro is the natural partner in the same cool-season herb bed, and rainbow chard can fill the same bed and be picked alongside it all season.
Pests and problems
The common pests to watch for with parsley are carrot rust fly, aphids and wireworms. Inspect the plants regularly, wash aphids off with a strong jet of water, and keep the bed weeded and free of debris. The pest identifier helper can help if you are unsure what you are seeing. In Zone 13, heat and humidity are the bigger threats: wet foliage invites leaf spot, and a plant that dries out bolts early. Water at the base, give plants room for air to move, and pick off spotted outer leaves promptly. Parsley is a biennial, so a plant that survives the cool season may flower in its second year — when it does, the leaves turn bitter and it is time to sow a fresh batch.
Harvest and storage
Harvest parsley by cutting the outer stems at the base, starting about 70–90 days after sowing, and always leave the centre growing point so new leaves keep coming. Pick in the cool of the morning, use the leaves fresh the same day, and take a little at a time — regular picking keeps the plant producing and delays bolting. For storage, parsley freezes well chopped in ice-cube trays with a little water or oil, and it dries better than most soft herbs if you have a dry, airy spot. When a plant bolts in the heat, let it go and sow a fresh row when the cool months return. Chives sown in the same cool window make a good kitchen partner for a parsley harvest.
Frequently asked questions
When should I plant parsley in Zone 13?
In the coolest months, roughly November through February. A November sowing is ready to start picking in about 70–90 days.
Why is my parsley seed not germinating?
It is slow, not dead. Parsley seed takes 14–28 days to germinate, and the seedbed must stay moist the whole time.
What soil and spacing does parsley need in Zone 13?
Morning sun and afternoon shade, rich well-drained soil with a pH of 6.0–7.0, spaced 6–8 inches apart.
How do I harvest parsley without killing the plant?
Cut the outer stems at the base and leave the centre growing point alone.