Sun: Full sun • Water: Moderate; drought-tolerant once established • Soil: Well-drained; not too rich
Bloom: Early summer until frost • Hardiness: Grown as an annual everywhere • Type: Fast, easy annual
Marigolds are about as easy as flowers get — fast from seed, tolerant of heat and poor soil, and blooming non-stop from early summer until frost. Their warm gold and orange flowers are a garden classic, and they’re a favorite companion plant in the vegetable patch. Here’s how to grow marigolds and keep them flowering all season.
How to plant marigolds
Marigolds thrive in full sun and well-drained soil, and they actually bloom best in soil that isn’t too rich. Sow seeds directly in the garden after the last frost, or start them indoors four to six weeks earlier for a head start — marigolds germinate quickly, often in under a week.
Barely cover the seeds with soil, keep them moist until they sprout, and thin the seedlings to give each plant room. Spacing depends on type: small French marigolds want 8 to 10 inches, while tall African (American) marigolds need 12 to 18 inches.
- Full sun and well-drained soil are all they need
- Sow directly after frost or start indoors 4–6 weeks early
- Barely cover seeds — they sprout fast
- Don’t over-enrich the soil, or you’ll get leaves over flowers
Marigold care
Marigolds are wonderfully low-maintenance. Water them at the base when the top inch of soil dries out; once established they tolerate dry spells well, and soggy soil or wet foliage is more of a risk than drought. Avoid overhead watering, which can encourage powdery mildew in humid weather.
They rarely need feeding — rich soil or heavy fertilizer produces lush foliage at the expense of flowers. Pinching young plants once encourages bushier growth and more blooms.
Deadheading for more blooms
The single best thing you can do for marigolds is deadhead them. Pinching or snipping off faded flowers stops the plant from setting seed and pushes it to keep producing new blooms right up until frost. A quick pass every few days keeps plants tidy and covered in color all season.
Marigolds as companion plants
Marigolds have a long-standing reputation in the vegetable garden. Their scent is thought to deter some pests, and French marigolds in particular are used to help suppress root-knot nematodes in the soil. Whether or not they solve every pest problem, they’re bright, bee- and hoverfly-friendly, and a cheerful edging around tomatoes and other crops.
Common marigold problems
Marigolds have few serious problems. In hot, dry spells spider mites can appear — a spray of water helps knock them back. Slugs and snails may nibble young seedlings, and powdery mildew or gray mold (botrytis) can show up in damp, crowded conditions, so give plants airflow and water at the base. Deadheading and removing any spotted foliage keeps them healthy.
Types of marigolds
Most garden marigolds fall into three groups. French marigolds are compact, bushy plants with masses of small flowers, perfect for edging and containers. African (also called American) marigolds are taller, with large pom-pom blooms on upright plants that make a bold statement. Signet marigolds have small, single, edible flowers and lacy foliage with a citrusy scent, and they’re wonderful spilling over the edge of a pot or bed.
- French: compact and bushy, ideal for edging and pots
- African / American: tall with large pom-pom blooms
- Signet: small edible single flowers, lacy citrus-scented leaves
Growing marigolds in containers
Marigolds are excellent container plants and one of the easiest flowers for a first pot or window box. Use any pot with drainage holes and a free-draining potting mix, plant French or signet types for compact growth, and place the container in full sun. Water when the top inch of soil dries out, and deadhead regularly to keep the blooms coming. Because pots drain and dry faster than garden beds, container marigolds appreciate slightly more frequent watering in hot weather — but they still won’t want to sit in soggy soil.
Quick marigold growing tips
Marigolds are one of the most forgiving flowers you can grow. The essentials:
- Grow in full sun and well-drained, not-too-rich soil
- Sow seeds after the last frost, barely covering them
- Deadhead often — it’s the key to non-stop blooms
- Water at the base and let them dry slightly between waterings
- Skip the fertilizer; lean soil means more flowers
- Pinch young plants for bushier growth
- Plant them among vegetables as a bright, pollinator-friendly companion
Sun, well-drained soil and regular deadheading are all marigolds really need.
Marigold growing FAQs
How do you grow marigolds from seed?
Sow marigold seeds in full sun after the last frost, barely covering them with soil, or start them indoors four to six weeks earlier. They germinate in under a week. Keep the soil moist until they sprout, thin the seedlings, and they’ll bloom within about eight weeks.
Do marigolds come back every year?
Most garden marigolds are annuals, so they complete their life cycle in one season and don’t return from the roots. However, they self-seed readily, so you’ll often find new marigold seedlings popping up the following spring where last year’s plants dropped seed.
How do you keep marigolds blooming?
Deadhead regularly — removing faded flowers stops the plant setting seed and keeps it producing new blooms until frost. Give them full sun, avoid over-fertilizing, and water at the base. That’s all it takes for months of continuous color.
Do marigolds repel pests?
Marigolds are a popular companion plant. Their scent is thought to deter some insect pests, and French marigolds are used to help suppress root-knot nematodes in the soil. They also attract pollinators and beneficial insects, which makes them a useful addition to a vegetable garden.
How much sun do marigolds need?
Marigolds need full sun — at least six hours a day — to bloom their best. They’ll tolerate a little light shade but flower far more heavily in a bright, sunny spot.
Should you pinch marigolds?
Pinching out the growing tips of young marigolds encourages them to branch, producing bushier plants with more flowers. Combined with regular deadheading, it keeps plants compact and blooming heavily all season.
See the marigold flower profile, marigold meaning guide, and the October birth flower.