Light
All cultivars of Pennisetum glaucum thrive in full sun. The plant will tolerate partial shade, but won’t look as dramatic in its color.
Soil
Ornamental millet is a tolerant plant. It can sustain itself in drier soils and drought. It prefers good drainage as it has some issues with becoming waterlogged. Salt levels and pH balance is not an issue for this plant either.
Water
Pennisetum glaucum has medium needs for water. It is not considerably thirsty, and this can be offset by a good layer of mulch. Consider 1 inch of rain per week.
Temperature and Humidity
Ornamental millet is not hardy, rather it is a hot climate, warm-season plant. Higher temperatures result in faster growth and taller plants. As long as the soil is kept evenly moist, high humidity is not required.
Fertilizer
It is a good idea to treat the ornamental millet with a feeding of 15-0-15 fertilizer once when you first transplant it or after emergence if the seeds were directly sown.
Types of Millet
Some pearl millet types produce grain while others are purely ornamental. Here are a few more types of ornamental millet to choose from for your garden:
‘Purple Majesty’: The iconic millet hybrid is often called “tall, dark, and handsome” because of its deep purple foliage and plumes that reach a full height of 5 feet; plumes grow 8 to 15 inches tall and are covered in golden pollen when in bloom.‘Purple Barron’: Though it looks like ‘Purple Majesty’, this is a more compact hybrid that grows to 3 feet and with darker leaves, making it a good container plant.‘Purple Jester’: This compact pearl millet has more variegated foliage of burgundy, green, and chartreuse.‘Jade Princess’: Chartreuse foliage reaches only 2 feet in height; the flower spikes are pollen-free; this smaller type is also often used for container gardens.
How to Grow Millet From Seed
Pearl millet is propagated with seeds. If you plan to plant seeds, they can be started inside in trays 45 days before frost and hardened to the cooler weather. It is fast-growing and will take only 60 days for the plant to go from seed to flower. Move to larger pots as the plants outgrow their starter trays to avoid the millet from becoming root-bound. Direct sowing of the seeds can be done when the danger of frost has passed, but the soil needs to be sufficiently warm for germination to occur. Plant seeds 1 to 3 inches down from the top for best germination though if you go deeper, seedlings will still likely emerge. Keep the soil moist but not soaked.
Common Pests & Plant Diseases
Pearl millet can encounter aphids and spider mites, which can be eradicated with insecticidal soap. Plants may be riddled with wireworms, which can be removed by hand, biological control, or insecticides. Be on the lookout for the following diseases: ergot (a fungus), cercosporin leaf spot (brown and tan blotches on leaves), downy mildew (a fungus caused by wet foliage), leaf rust (appears where it’s humid), and smut (which also appears on corn). Fungicides will help with these issues.
Common Problems With Millet
Millet is easy to grow, but it can encounter a couple of problems that can be fixed.
Lackluster Color
Pearl millet’s richest color purple and maroon leaves are achieved in full sun, and planting these cultivars in any other light conditions will not do them justice.
Poor Growth
There are a couple of reasons why you may not have robust growth. The seeds or plants from the nursery may have been placed in soil that was too cool or wet for them to thrive. Another issue is weeds; pearl millet cannot compete with weeds for nutrients. Weed control is important for better growing pearl millet.
