Giant Baby Tears
Micranthemum umbrosum
Linderniaceae

About
Micranthemum umbrosum is the pale-green stem plant the trade sells as giant baby tears: soft, rather brittle stems carrying paired, almost circular leaves about half a centimetre wide. Untrimmed shoots reach 10-30 cm and lean, branch and sprawl instead of carpeting, so it works as a loose midground bush or as a foreground mound that you keep cutting back. That is exactly how it differs from the two carpets already in this catalogue, Monte Carlo (M. tweediei) and dwarf baby tears: those stay 1-5 cm and creep flat, while umbrosum has visibly larger round leaves and grows upward. It is fast, but hungrier for light than its beginner reputation suggests - in a dim tank it drops its lower leaves, the remaining leaves go holey, and the stems snap so fragments drift up to the surface.
Care
Plant a dozen stems as a group in nutrient substrate under solid medium light of roughly 25-70 PAR. CO2 is not mandatory, but without it growth slows sharply and the leaves stay small. Trim every week or two: cutting back forces side shoots and keeps the bush dense rather than leggy.
Frequently asked questions
- What water parameters does a Giant Baby Tears need?
- Giant Baby Tears does best at 15–26 °C (59–78.8 °F), pH 5.5–7.5 and a general hardness of 2–15 °dGH.
- Where should Giant Baby Tears be placed in the aquarium?
- Giant Baby Tears works best in the midground and reaches around 30 cm.
- Is the Giant Baby Tears suitable for beginners?
- Giant Baby Tears sits in the middle of the difficulty scale — manageable for a careful beginner who has done the reading, but it has specific needs worth researching first.
Sources
- Flowgrow Aquatic Plant Database - Micranthemum umbrosum (Shade mudflower)
- Tropica Aquarium Plants - Micranthemum umbrosum (048 ST)
- Aquasabi - Micranthemum umbrosum (Giant baby tears), pot
- Buce Plant - Micranthemum Umbrosum (Giant Baby Tears)
- Aquarium Co-Op - Baby Tears (Micranthemum umbrosum)
- Flowgrow Aquatic Plant Database - Micranthemum tweediei (Tweedie's pearlweed / Monte Carlo)