Fast growing aquarium plants include hornwort, water wisteria, vallisneria, hygrophila, and duckweed.
If you want a lush tank fast, you can have it. I have grown dozens of tanks for clients, contests, and my own living room, and fast growing aquarium plants are my favorite tool. In this guide, I will show you which plants grow quick, how to keep them healthy, and how to avoid common mistakes. You will learn how to choose, plant, feed, and style fast growing aquarium plants so your tank looks full, balanced, and clean.
Why fast growing aquarium plants matter
Fast growing aquarium plants do more than fill space. They use extra nutrients and help block algae. They also give fish cover and reduce stress. This means a cleaner, safer tank with less work for you.
They are also great for new tanks. The early weeks can be rough. Fast growers act like a filter that starts right away. They suck up ammonia and nitrate while your biofilter wakes up. In my first big tank, a wall of wisteria saved my fish during the first month.
If you like to tweak your aquascape, fast growers let you try ideas without long waits. You can trim and replant often. You see results in days, not months.
Top fast growing aquarium plants for beginners
Below are fast growing aquarium plants that are hardy, easy to find, and quick to root or float. I group them by type so you can mix and match.
Hornwort (Ceratophyllum demersum)
- Growth: Very fast in most tanks.
- Light and CO2: Low to medium light, no CO2 needed.
- Tips: Can float or be anchored. Sheds needles if light is too weak or if it gets shocked. Great for fry and shrimp.
Water wisteria (Hygrophila difformis)
- Growth: Fast and forgiving.
- Light and CO2: Medium light, CO2 not required.
- Tips: Trim tops and replant. Leaves change shape based on light and nutrients. Excellent at fighting algae.
Hygrophila polysperma
- Growth: One of the fastest stem plants.
- Light and CO2: Low to medium light, no CO2 needed.
- Tips: Can take over. Trim weekly if needed. New hobbyists love it because it bounces back from most errors.
Vallisneria (jungle val, corkscrew val)
- Growth: Sends runners fast.
- Light and CO2: Low to medium light, no CO2 needed.
- Tips: Plant individual crowns an inch apart. Do not bury the crown. Great for a tall, grassy background.
Anacharis or Elodea/Egeria densa
- Growth: Fast in cool to moderate temps.
- Light and CO2: Low to medium light, no CO2 needed.
- Tips: Can float or be planted. Melts in very warm water. Perfect for goldfish and livebearer tanks.
Rotala rotundifolia
- Growth: Fast under good light.
- Light and CO2: Medium to high light, CO2 helps but not required.
- Tips: Turns more red with strong light and iron. Trim often for dense bushes.
Floating plants (duckweed, frogbit, Salvinia)
- Growth: Very fast at the surface.
- Light and CO2: Low to high light, no CO2 needed.
- Tips: Shade the tank and eat extra nutrients. Duckweed grows the fastest but can be messy. Frogbit and Salvinia are easier to control.
Guppy grass (Najas guadalupensis)
- Growth: Explosive in nutrient rich water.
- Light and CO2: Low to medium light, no CO2 needed.
- Tips: Ideal for breeding tanks. Breaks apart if handled rough. Vacuum gently.
Pearl weed (Hemianthus micranthemoides)
- Growth: Fast with light and food.
- Light and CO2: Medium light, CO2 helps.
- Tips: Can be a bush or a fine carpet. Trim short and replant for lush mats.
My rule of thumb for fast growing aquarium plants is to mix stems, runners, and floaters. That gives you speed, depth, and control of light and nutrients.
Setup: light, CO2, and nutrients for speed
Fast growth needs light, carbon, and food. Think of these as a three leg stool. If one is weak, the plant slows down.
- Light: Start with 6 to 8 hours per day. Use medium light for most fast growing aquarium plants. If you see algae or pale tips, adjust by 30 minutes per week.
- CO2: Optional for many easy plants. CO2 speeds growth and improves color. If you add it, aim for a gentle, stable level. Fish should act normal and breathe fine.
- Fertilizers: Plants need both macros and micros. Macros are nitrogen, phosphorus, and potassium. Micros include iron and traces. Dose small amounts 2 to 3 times per week. Root feeders love root tabs near their base.
I like a simple routine. Test once a week. Watch leaves every day. Plants are honest. New growth shows the truth.
Substrate choices and root care
You can grow fast growing aquarium plants in many substrates. The best one is the one you will maintain.
- Inert gravel or sand: Clean and cheap. Add root tabs for heavy root feeders like Vallisneria.
- Nutrient rich soil or aquasoil: Great for speed and rich growth. Needs more water changes at first. Can lower pH a bit.
- Depth: Aim for 2 to 3 inches so roots can spread. Keep the front lower for a nice view.
I often start clients on inert gravel with tabs. It is simple. They learn dosing and pruning first. Later they try soil for a boost.
Pruning, propagation, and algae control
Fast growing aquarium plants demand pruning. This is good news. Trimming equals more plants.
- Stem plants: Cut the top and replant it. Remove lower bare parts if they look rough. Space stems so light can pass.
- Runners like Vallisneria: Clip extra runners to control spread. Move them to open spots to fill.
- Floaters: Thin weekly. Leave 50 to 70 percent of the surface open. This keeps gas exchange and light stable.
Fast growers starve algae by using the same food. If algae appears, add more fast growing aquarium plants, trim old leaves, and keep a steady light period. Do not blast light to fix color. Balance beats brute force.
Aquascaping with fast growing aquarium plants
You can build a full layout with quick plants. Use height, texture, and gaps to guide the eye.
- Background: Vallisneria, Rotala, and Hygrophila make a tall wall. Stagger groups for depth.
- Midground: Wisteria and pearl weed shape the scene. Keep it trimmed so fish have lanes.
- Surface: Frogbit or Salvinia create soft shade. This calms shy fish and boosts color.
- Focal points: Use a bold group on the golden third. Keep low plants near wood or rock to frame it.
When I design client tanks, I plant heavy on day one. I add at least 70 percent plant cover. The tank looks full fast, fish relax, and algae stays low.
Troubleshooting common issues
Even fast growing aquarium plants can stall. Here is how I fix the usual problems.
- Yellow or pale leaves: Often low nitrogen or iron. Add a balanced fertilizer and watch new growth.
- Holes in leaves: Possible potassium gap or older leaves aging. Dose potassium and trim old parts.
- Melting stems: Shock from new water or major changes. Keep parameters stable. New growth will replace melt.
- Spindly growth and long gaps: Light too weak or plants shaded. Increase light slowly and trim dense tops.
- Algae on leaves: Too much light for the current nutrient level. Reduce photoperiod and add more fast growers.
Make one change at a time. Wait a week. Plants need time to respond.
Buying, quarantine, and safety
Healthy plants grow fast. Take a minute to choose well.
- Look for firm stems, bright tips, and clean roots. Avoid mushy parts and dark rot.
- Rinse plants in clean water. A short dip in diluted peroxide or alum can reduce pests. Rinse again well.
- Quarantine new plants in a bucket with light for a few days. You can spot snails or hitchhikers and remove them.
- Remove rock wool from pots. Plant stems in small groups, not big bunches. This helps water flow and root growth.
I lost a whole shrimp colony once to an unwashed bunch. Since then, I never skip the rinse and rest step.
Cost and maintenance budget cheat sheet
You can run fast growing aquarium plants on a budget. Keep it simple.
- Light: A reliable LED is worth it. Choose one that covers your tank length.
- Fertilizer: A basic all in one works for most tanks. Add root tabs for heavy root feeders.
- Tools: Scissors, tweezers, and a small siphon. You can start with kitchen scissors if needed.
- Time: Plan 30 to 60 minutes per week. Trim, thin floaters, and clean the glass.
Fast growing aquarium plants pay you back. They cut algae, hide gear, and give life to your tank.
Frequently Asked Questions of fast growing aquarium plants
What are the fastest growing aquarium plants for low light?
Hornwort, Hygrophila polysperma, and Vallisneria grow well in low light. Floaters like frogbit also thrive with little light.
Do fast growing aquarium plants need CO2?
Most do not need CO2, but they grow faster with it. CO2 improves color, density, and resilience.
How do I stop duckweed from taking over?
Skim some out every few days and add a surface ring to limit spread. Keep your filter flow gentle so it gathers in one area.
Can fast growing aquarium plants reduce algae?
Yes. They use nutrients and shade the tank, which starves algae. Keep a steady light period and prune often for best results.
How often should I trim stem plants?
Trim every 1 to 2 weeks in active tanks. Replant healthy tops and remove old, bare bottoms.
Are fast growing aquarium plants safe for goldfish?
Yes, but goldfish may nibble. Use tougher plants like Vallisneria and hornwort, and expect some grazing.
What fertilizer routine is best for beginners?
Dose a small all in one fertilizer two to three times per week. Add root tabs under heavy root feeders every one to two months.
Conclusion
Fast growing aquarium plants make your tank look alive fast. They clean the water, calm your fish, and keep algae in check. With the right light, simple dosing, and regular trims, you get a lush scape that stays stable.
Pick three to five species from this guide and plant heavy this week. Keep notes, watch new growth, and adjust slowly. If you want more tips, subscribe, ask a question, or share your own growth wins in the comments.
