/r/Hydroponics

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Hydroponics is a method of growing plants without soil, using nutrient-enriched water instead. This technique can involve various inert mediums like sand, gravel, or perlite to provide mechanical support for the plants. Please note: While we are not against cannabis we would like to limit posts here please feel free to share those posts over at /r/Hydro or /r/MicroGrowery - Thank You


The Hydroponics Reddit

Hydroponics - a subset of hydroculture, the method of growing plants without soil, using mineral nutrient solutions in a water solvent. Terrestrial plants may be grown with only their roots exposed to the mineral solution, or the roots may be supported by an inert medium, such as perlite or gravel. The nutrients in hydroponics can come from an array of different sources; these can include but are not limited to byproduct from fish waste, duck manure, or normal nutrients.

Wikipedia: hydroponics

The r Hydroponics wiki


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/r/Hydroponics

148,974 Subscribers

1

Fertilizer advice

Looking for an appropriate fertilizer to use for growing pumpkins hydroponically. Literal brand names please. Links to buy it would be even better.

1 Comment
2025/02/03
03:17 UTC

1

DIY or amazon special for first DWC setup

I'm looking to start my first hydroponic setup, outside of using aerogardens a handful of times. I'm wanting something a little bigger and was figuring I'd just build my own basic dwc setup with a 3 gallon tot etc... but I found some basic setups on amazon for under $50 for the pretty much everything to get started. I'd imagine the quality wouldn't be the same as buying all the parts individually but the price is very appealing. Has anyone tried these type of kits out before?

I've attempted to attach a picture of one of the amazon specials, hopefully it worked.

https://preview.redd.it/xpfntnzv9uge1.png?width=1500&format=png&auto=webp&s=e202d1a700bb9b467c7681889f0f406681de4a40

2 Comments
2025/02/03
02:57 UTC

0

Is this magnesium deficiency?

Getting this browning along the edges and yellowing in the center of the leaves on all 3 basil plants in my system. Using Gecko Grow Lettuce Formula kit. Balanced pH to 6. Was looking at this https://www.e-gro.org/pdf/2016-4.pdf but nothing in here looks like what I'm getting, with the closest being magnesium. Any ideas?

4 Comments
2025/02/03
02:32 UTC

2

Tomatoes - How to start?

Hello,

I would like to grow year round tomatoes, the large ones. I live in the South USA and mostly want to keep this in my garage with a grow light.

I tried this in college with basil using a storage container, air stone and baskets sitting in water. As you might expect, my roots rotted after the plants took off.

I am older now with a proper budget and I would like to have a nice, reusable system. I found a great website called hydroland but its only in the AU. Do we have a good wholesaler website for us in the US with good starter systems?

If this works out, there are plenty of other veggies I would like to try but I just need a few successes under my belt and place to start. If others here are kind enough to point me toward a good place to learn and a system to start, I would appreciate it greatly.

Thanks

3 Comments
2025/02/03
01:13 UTC

1

Aeration in Res

Question. I have a 45lt resivour in my Old Turbo Tank NFT system how many wats would be needed? 15,25,40,55W?

5 Comments
2025/02/03
00:56 UTC

1

just starting

got a tower system for christmas, and just now getting it set up. it’s ready to go but what is the best nutrients to put in the water? bought in town kind or homemade recipe that’s not so complicated that it’s confusing ? looking forward to learn about growing with hydroponics, we always grow a big garden in the ground or in tubs. thank yall !

0 Comments
2025/02/02
22:34 UTC

1

Need help - how to properly set up two containers using one easy2go valve

Leaving town for a while. I want to sit my plants in these two containers using the easy2go float/valve thing (I only have one).

Should I elevate them and run this flex pipe through the bottom of each? It says it will only let in 1 inch of water so it seems questionable to go through the side, even trying to do it at the very bottom of the side.

Thanks in advance for any advice

5 Comments
2025/02/02
19:30 UTC

3

[DIY] New Switching to Coco – Triple Pot Kratky vs. Self-Wicking Tub? Advice Needed!

I'm growing cannabis indoors with LEDs using soil, but I'm considering switching to coco. I'm debating between two DIY bottom-feed systems: Kratky with triple pots or a Self-Wicking Tub, adapting them to the plastic containers I can find. Both would have four pots connected to a central reservoir, keeping water levels balanced via communicating vessels with a float valve at the bottom height needed.

Would these systems work well with coco, or should I add a top-feed irrigation to prevent issues?

I’m also thinking of adding an aerator at the bottom. If I use triple pots, does it actually benefit root development, or would it just restrict root space if I’m already aerating?

Lastly, in case of pests or nutrient buildup, which system would be easier to clean and maintain?

Would love to hear from anyone with experience in these setups!

1 Comment
2025/02/02
19:12 UTC

0

hyrdroponics system in 2nd week of thc seedling stage any suggestions for how often to water? How many hours light on and if should add nutrients yet.

1 Comment
2025/02/02
18:54 UTC

1

Do the plant nutrients linger in a container? Any harm in reusing the container for other purposes?

If I use a container to hold water w/nutrients for hydroponics, in the future can I reuse that container for storing food, etc? Any lingering harm from the plant nutrients? Or if you accidentally ingest that plant water, is it in any way harmful to humans? Thanks…

1 Comment
2025/02/02
18:41 UTC

5

Pre-beginner question

I'm wondering if this set will work on a room with temperature ranging from 16 (winter) to 21 (summer)?

1 Comment
2025/02/02
18:35 UTC

1

Question for seedling

I got two questions regarding a seedling

  1. Are temps around 73-75 when light on and 68 when lights are off and around 73 -75 humidity good for seedling I try to do research but get a bunch of number

  2. Is it ok to plant in a 5 gallon fabric pot so there is no moving it during its whole life

3 Comments
2025/02/02
18:00 UTC

2

After 2 years of successful soil grows, I want to try some hydro. What kind of system?!

I have a 5x3 and a 5x5 tent so I was thinking of putting a two sight system in my 5x3. But I don't know what to do should I do rdwc should I do just dwc should I do ebb and flow a flood and drain.... Etc. like autopots, blumats, lol y'all get what I'm asking. You have no clue how much I appreciate the help in the replies so whoever is taking their time out of their day to help me out thank you very much and God bless.

17 Comments
2025/02/02
17:26 UTC

1

Dutch bucket systems

I see lots of posts with people growing tomatoes using dutch buckets. My question is what can be grown along side tomatoes in dutch buckets using the same nutrient reservoir. Lettuce? Cucmbers? Peppers of any sort?

1 Comment
2025/02/02
17:24 UTC

1

Clay pebbles

Where can I find these cheaper than Amazon and if im going to build a 8- 5 gal hydroponic system how do i calculate the wattage needed for the air pump. I have a Vevor system, seems easier to build another one that purchase.

12 Comments
2025/02/02
15:42 UTC

1

First timer looking for insights and advice.

This is an 18 gal tote. I'm building my first hydroponic system and I'm starting with DWC for tomatoes and jalapeños. I'd like to do 4 plants but I'm worried they'll be to crowded. My question is how many plants can healthily grow in this space?

3 Comments
2025/02/02
15:11 UTC

9

Ponix Herbert

Hi there anyone a solution just wanted to start my Herbert again after 2 yrs then the Ponix app is gone. Any hints. Cheers Lupon

1 Comment
2025/02/02
13:31 UTC

21

hydroponic DWC system

13 Comments
2025/02/02
06:27 UTC

4

Kratky slime

Noted this slime and white dots on the bottom of my tiny baby basil grow sponge after leaving it untouched for about 4 days in a kratky set up. The one small root this plant has is completely engulfed in slime. I did add cronk nutrient monkey juice (bacillus spp.) to this one hoping to help with preventing root rot. But this looks like fungus? Is this plant toast? Would a h2o2 soak and solution change save it? Thanks

2 Comments
2025/02/02
06:13 UTC

1

Homemade "aerogarden" style (larger) system

I've made an hydro system few years ago. I've used a 45gal plastic barrel cut in half, reservoir on bottom, cfl compact bulbs on top. Floating styrofoam sheet with holes. A water pump with a 3d printed ventury to move and oxygenate water. Worked really well and i've got giant basil leaves.

https://preview.redd.it/umws5rws0nge1.png?width=339&format=png&auto=webp&s=11032f5a99ae9f7e5d051a15fd1db5a4173a49c2

https://preview.redd.it/nt32tqy71nge1.png?width=340&format=png&auto=webp&s=4980351e9412e722aab0f6e88343a7c0d46ccd4d

I've also made a 3d model of this system with 3d printed ventury with sketchup. I've a youtube video of this if interested.

4 Comments
2025/02/02
02:38 UTC

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