Corkscrew Val
Vallisneria asiatica 'Spiralis'
A val with tightly spiralled leaves that adds movement and easy green cover.
| Care Difficulty | Beginner |
| Lighting | Low to Medium |
| CO2 Requirement | Not required |
| Growth Rate | Fast |
| Placement | Background |
Overview
Corkscrew Val (Vallisneria asiatica 'Spiralis') is a val with tightly spiralled leaves that adds movement and easy green cover. It is a beginner plant to grow, which makes it a great pick for beginners and low-tech tanks.
This guide explains, in plain language, how to grow Corkscrew Val well: what it looks like, how much light it wants, whether it needs CO2, how to plant and place it, how to make more of it for free, and the simple mistakes to avoid.
Appearance & Growth
A val with tightly spiralled leaves that adds movement and easy green cover.
It is a fast grower and is normally used in the background of the aquarium. Fast growth means you will trim it often, but it also soaks up lots of nutrients and helps keep algae away.
Lighting
Corkscrew Val does best under low to medium light. Low to medium light is plenty, so a basic aquarium LED will keep it happy.
Keep the lights on a timer for about 6 to 8 hours a day. Leaving lights on longer usually grows more algae, not more plant, so add light time slowly and watch for any green film.
CO2 & Fertilising
CO2: Not required. This plant grows fine without added CO2, so it suits simple, low-tech tanks.
Feed it with an all-in-one liquid fertiliser (such as API Leaf Zone) added to the water each week, and push a root tab into the substrate near the roots, as this is a hungry root-feeder. If leaves turn yellow, get holes, or stop growing, that is almost always a lack of nutrients, not a disease.
Planting & Placement
Plant Corkscrew Val so the white base of the leaves (the crown) sits just above the substrate. Burying the crown causes rot. It will quickly send runners sideways to fill the back of the tank.
How to Propagate (Make More)
It spreads fast by runners across the substrate. Just separate and replant the young plants, or pull up runners to keep it from taking over.
Swapping cuttings is one of the best parts of the hobby - over time a single healthy plant can fill your tank and stock a few more.
Common Problems & How to Fix Them
The most common problem is algae growing on the leaves. This usually means too much light, not enough nutrients, or weak water flow - not a problem with the plant. Lower the light a little, add fertiliser, and improve flow.
Some leaf loss right after planting is normal while the plant gets used to living underwater - keep your light, CO2 and fertiliser steady and new growth will follow. Always remove dead or rotting leaves quickly to keep the plant and water healthy.
Is Corkscrew Val Right for Your Tank?
Corkscrew Val is an easy, rewarding plant that fits almost any freshwater aquarium, including first tanks and low-tech setups. Pair it with our other plant and aquascaping guides to build a lush, healthy planted tank.