African Marigold

A tall marigold variety producing large, globular pom-pom blooms in shades of yellow and orange. African marigolds can reach three feet tall and are excellent for back-of-border plantings and cutting gardens. They are heat-loving and drought-tolerant once established, though they benefit from deadheading to prolong blooming.

African marigold seeds are large and easy to handle. Start indoors six to eight weeks before the last frost to allow enough time for these slower-maturing plants to begin blooming by early summer. Sow seeds a quarter inch deep in moist seed-starting mix and maintain 70 to 75 degrees Fahrenheit for germination in five to seven days. Pinch the growing tip when seedlings have four to six leaves to encourage branching. Harden off thoroughly before transplanting outdoors after all frost danger has passed.

The Season Plate

Your African Marigold Year

Composed for Zone 7 · typical seasons · frost passes Apr 2, returns Nov 1

Sow African Marigold Apr – Jun, pick Jul – Oct. Set your climate below and every date on this plate re-times itself.

Sowing window

Apr – Jun

re-timed to your frost dates

Plant out

after Apr 2

once frost risk has passed

First picking

around Jun 14

≈ 60 days from sowing · 20-30 large per plant

Composed for —ColdTemperateMildWarmUse my locationUsed once to set your season · only the zone is kept

Week-by-week African Marigold reminders watering, feeding and pruning, timed to your dates

In the app

Frost alerts for your garden a warning before a cold night costs you the crop

In the app

Succession sowing dates so the picking never gaps mid-season

In the app

Prefer email? Get monthly reminders in the Almanac

Keep my dates — free for 7 daysWe nudge you as each window opens · cancel anytime

Start African marigold seeds indoors six to eight weeks before the last frost, as they need a longer season than French types to reach their impressive size. Sow seeds a quarter inch deep in moist seed-starting mix at 70 to 75 degrees Fahrenheit for germination in five to seven days. Transplant hardened-off seedlings outdoors after all danger of frost has passed, spacing them twelve to eighteen inches apart in full sun.

African marigolds thrive in hot weather and perform best when daytime temperatures are consistently above 75 degrees Fahrenheit. They tolerate poor soil but produce the largest blooms in moderately fertile, well-drained garden soil. Water at the base of plants rather than overhead to prevent the heavy flower heads from collecting water and developing botrytis rot.

Deadhead spent flowers regularly by cutting the stem back to the nearest set of leaves to keep plants producing new buds. The large pom-pom blooms can become top-heavy after rain, so plant in a location sheltered from strong winds or provide light support. Feed monthly with a balanced fertilizer to sustain vigorous growth and continuous flower production throughout the summer and into early fall.

Like other Tagetes species, African marigolds release alpha-terthienyl from their roots, which suppresses root-knot nematodes in surrounding soil. Plant them as a living fumigant near tomatoes, peppers, and eggplant. Their tall stature makes them suitable as back-of-border companions for shorter vegetables and flowers. The strong foliage scent deters whiteflies, aphids, and some beetles. Avoid planting near beans and brassicas.

The Society Table

Tomato belongs beside it. Cabbage doesn't.

Old growers' knowledge, checked against African Marigold's real companion table below — test any plant you're growing.

Grows well in the company of · 3

TomatoMarigoldZinnia

Keep apart · 1

Cabbage

Plant African Marigold with good neighboursThe planner flags conflicts before they're in the ground

African marigolds grow best in moderately fertile, well-drained soil with a pH of 6.0 to 7.0. They tolerate poor soil but produce their largest, most impressive blooms with regular feeding. Work compost into the planting area before setting out transplants. Feed every three to four weeks with a balanced liquid fertilizer or apply slow-release granular fertilizer at planting time. Avoid excessive nitrogen which promotes foliage over flowers.

Ideal Temperature

Hardiness Zone Compatibility

Cut African marigold blooms for arrangements when flowers are fully open and colors are at their most vivid. The large pom-pom heads are stunning in bouquets and last well in water. For seed saving, allow flower heads to dry completely on the plant until they become papery and brown. Pull the dried head apart to reveal the long, slender black and white seeds. Deadhead remaining flowers consistently throughout the season to maximize bloom production.

Storage & Preservation

Fresh-cut African marigolds last five to seven days in a vase with clean water, though the strong foliage scent may be noticeable indoors. Remove all leaves below the waterline. For drying, hang individual stems upside down in a warm, dark, ventilated area for two to three weeks. The large heads retain their shape and color well when dried. Seeds can be stored in paper envelopes in a cool, dry place for up to three years.

Troubleshooting Common Problems

The most frequent issue is botrytis rot of the large flower heads during wet weather or from overhead irrigation. Always water at the base. Tall varieties may topple in wind and rain due to top-heavy blooms and benefit from sheltered planting locations. African marigolds are slower to start blooming than French types and need warm conditions to perform well. In cool, overcast climates they may produce abundant foliage but sparse flowering.

Growing Tips

1. Start seeds indoors 6-8 weeks before your last frost date for the earliest blooms. African marigolds have a longer time to first flower than French marigolds, so the indoor head start is especially valuable in short-season climates.
2. Pinch the central growing tip when seedlings reach 15 cm tall to encourage lateral branching and a bushier plant with more flower stems. This single step can double your total bloom count over the season.
3. Plant African marigolds in full sun with at least 6-8 hours of direct sunlight daily. They tolerate partial shade but will produce fewer and smaller blooms with weaker stems that tend to flop over.
4. Space plants 30-45 cm apart to allow adequate air circulation around the dense foliage and large blooms. Poor air flow in humid conditions invites botrytis gray mold, which rots the flower heads from the inside out.
5. Water at the base of the plants rather than overhead to keep foliage and blooms dry. Wet petals on the dense double flowers trap moisture and create ideal conditions for fungal diseases.
6. Deadhead spent blooms promptly by cutting the stem back to just above the next leaf node. Allowing flowers to set seed signals the plant to slow down flower production significantly.
7. Interplant African marigolds throughout your vegetable garden as a biological pest management strategy. Their roots release compounds toxic to root-knot nematodes, and their strong scent deters whiteflies, aphids, and tomato hornworms.
8. Avoid heavy nitrogen fertilization, which produces lush foliage at the expense of flowers. A balanced or slightly phosphorus-heavy fertilizer applied every 2-3 weeks supports the best bloom production.
9. Stake taller varieties (60-90 cm) in exposed or windy locations, as the heavy flower heads can cause stems to snap during storms. A simple bamboo stake and soft tie per plant provides adequate support.
10. Save seeds from your best-performing plants by allowing a few late-season blooms to dry completely on the stem. Store the harvested seeds in a cool, dry place — they remain viable for 2-3 years.