Pearlweed (Micranthemum glomeratus)
Pearlweed (Micranthemum glomeratus) is an undemanding, fast growing, and vibrant green aquarium plant native to Florida. It can be planted anywhere within the aquarium as it will grow in typical stem plant fashion if kept in mid to lower light conditions and can be trimmed to a desired height. If kept under high light conditions with a rich substrate and frequent trimming, it can be grown as a carpeting plant as well. With its ease of care and versatility, pearlweed is a fantastic plant for beginner and experienced keepers alike.
Pearlweed has an interesting history regarding its classification. For almost the entire time the plant has been in the hobby, it has been mislabeled as Micranthemum micranthemoides (or Hemianthus).
| Features | Details |
|---|---|
| Growth Habit | Stem plant; can form carpet with proper conditions |
| Light Requirements | Mid to low light; high light with trimming for carpeting |
| Substrate | Rich substrate recommended for carpeting |
| Trimming | Regular trimming helps maintain desired height and growth |
| Difficulty Level | Beginner to intermediate |
FAQ
Can pearlweed grow as a carpet in my aquarium?
Yes, pearlweed can be grown as a carpeting plant under high light conditions with a rich substrate and regular trimming.
What light conditions are best for pearlweed?
Pearlweed grows well in mid to lower light conditions. For carpeting, high light with a rich substrate and frequent trimming is recommended.
Is pearlweed suitable for beginners?
Yes, pearlweed is easy to care for and is ideal for both beginner and experienced aquarium keepers.

Megan Lee –
I’ve had pearlweed in my tank for three months now. It grows quickly and stays vibrant. I planted it in the middle of the tank and trimmed it every two weeks. It looks natural and fills the space well without needing much maintenance.
Neil Miller –
The plant arrived healthy and has spread nicely in my mid-light tank. I didn’t expect it to grow as fast as it did. I keep it trimmed to maintain a neat look and it’s become a favorite in my setup.
Cameron North –
Great plant for beginners. I didn’t know much about aquarium plants before, and pearlweed has been easy to care for. It stays green and grows steadily without any issues.