Everything you need to know about Gomphrena Seeds

Gomphrena Seeds (Globe Amaranth) Questions and Answers:
(Updated 02/03/2025)

When should I plant gomphrena seeds?
Gomphrena seeds can be started indoors 6-8 weeks before the last expected frost in your area. Sow them in seed starting mix, keep them moist, and provide plenty of light. Once the seedlings have a few sets of true leaves and the weather has warmed up, you can transplant them outdoors. Alternatively, you can sow gomphrena seeds directly into the garden after the last frost, once the soil has warmed to at least 15°C.

Where should I plant gomphrena?
Gomphrena thrives in full sun, so choose a location that receives at least 6 hours of direct sunlight daily. It prefers well-draining soil, so amend heavy clay soils with compost or other organic matter. Gomphrena is also drought-tolerant once established, making it a good choice for hot, dry areas.

How do I plant gomphrena seeds?
Gomphrena seeds are small, so sow them thinly on the surface of the soil. Lightly press them into the soil, but don't cover them completely, as they need light to germinate. Keep the soil moist but not soggy, and provide plenty of light. 

How far apart should I space gomphrena plants?
The spacing depends on the variety of gomphrena you are growing, but generally, space plants 15-30 cm apart. This allows them enough room to grow and prevents overcrowding, which can lead to disease problems. Check the seed packet or plant tag for specific spacing recommendations.

How do I care for gomphrena plants?
Gomphrena is a low-maintenance plant that requires minimal care once established. Water regularly, especially during dry spells, but avoid overwatering. Gomphrena does not need to be deadheaded, as the flowers will dry on the plant and can be used in dried arrangements.

Do I need to fertilize gomphrena?
Gomphrena is not a heavy feeder, so it does not require a lot of fertilizer. A light application of a balanced fertilizer at planting time is usually enough. Avoid over-fertilizing, as this can lead to excessive foliage growth and fewer flowers.

How do I deadhead gomphrena?
Gomphrena does not need to be deadheaded. The flowers will dry on the plant and can be left as is or used in dried arrangements. If you want to encourage more blooms, you can pinch back the tips of the stems when the plants are young.

How do I dry gomphrena flowers?
To dry gomphrena flowers, cut the stems when the flowers are fully open. Remove the leaves and tie the stems in bunches. Hang the bunches upside down in a cool, dark, and well-ventilated place. The flowers will dry in a few weeks.

How do I start Gomphrena seeds indoors?
To start Gomphrena seeds indoors, sow them in small pots or seed trays filled with well-draining soil. Lightly press the seeds into the soil and cover them with a thin layer (about 0.5 cm) of soil or vermiculite. Keep the temperature between 21-24°C and provide bright light or grow lights. Water lightly and keep the soil consistently moist but not soggy until germination, which takes 7-14 days.

What kind of soil does Gomphrena need?
Gomphrena grows best in well-draining, sandy or loamy soil with a pH between 6.0 and 7.5. It does not require highly fertile soil but benefits from moderate organic matter. Avoid heavy clay soil, as it retains too much moisture and may cause root rot. If necessary, improve drainage by adding sand or compost to the planting area.

How much sunlight does Gomphrena need to grow?
Gomphrena requires full sun, which means at least 6-8 hours of direct sunlight daily. Insufficient light may lead to weak, leggy growth and fewer flowers. It thrives in hot, dry climates and can withstand intense summer sun. If growing in partial shade, expect slower growth and reduced flowering.

How often should I water Gomphrena?
Water young plants regularly to help them establish strong roots, but avoid overwatering. Once mature, Gomphrena is drought-tolerant and only needs watering when the soil is completely dry. Water deeply but infrequently, about once a week, depending on rainfall and temperature. Overwatering can lead to root rot, so ensure the soil dries out between watering.

How long does it take for Gomphrena to bloom?
Gomphrena typically starts blooming 8 to 12 weeks after planting, depending on growing conditions. Regular deadheading can encourage continuous blooming throughout summer and into early autumn. Once established, Gomphrena produces an abundance of flowers that last for months. It is an excellent choice for long-lasting color in gardens or cut flower arrangements.

Can I grow Gomphrena in pots?
Yes, Gomphrena grows well in pots as long as the container has good drainage and is at least 20-25 cm deep. Use a well-draining potting mix and place the pot in a location that gets full sun. Water when the soil feels dry, but avoid overwatering. Container-grown plants may need more frequent fertilisation since nutrients wash out faster.

How do I prevent pests and diseases in Gomphrena?
Gomphrena is relatively pest-resistant but may occasionally attract aphids or spider mites. Regularly inspect leaves for pests and wash them off with a strong stream of water or apply insecticidal soap if needed. To prevent fungal diseases, ensure good air circulation by spacing plants 20-30 cm apart. Avoid overhead watering to keep the foliage dry and reduce the risk of mildew.

Can I save seeds from Gomphrena flowers?
Yes, you can save Gomphrena seeds by allowing the flowers to dry on the plant. Once they turn brown and crispy, cut them off and break apart the flower heads to collect the tiny seeds inside. Store the seeds in a cool, dry place in a paper envelope or airtight container. When stored properly, Gomphrena seeds remain viable for several years.