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As far as transplanting them into your hydroponic system you would want to move them from their initial growing medium and then place them into the new hydroponic medium within the system you are using. You would want to do this gently and quickly otherwise you could cause shock to the plant and risk damaging it. Make sure to gently wash any dirt off the roots and try not to break any of the roots. See here for more detail as well as other guides: proponics.co.uk/blogs/plants-and-vegetables/hydroponic-onions-a-grower-s-guide?_pos=3&_sid=a0b81feb5&_ss=r

They can grow in non-distilled too, but distilled gives you full control over the water’s nutritional contents.

That’s a great question but It’s not really possible to give a solid answer unfortunately because it totally depends on the scale and nature of the commercial operation.

Could you clarify exactly what you mean?

Because onions are not flowering plants you will want to use a grow nutrient mix as opposed to bloom. But during bulb development the focus should be on reducing nitrogen levels and increasing potassium (K) and calcium (Ca). This helps to strengthen the bulbs and ensure they develop well. Onions prefer pH levels between 6.0 and 6.8, and your EC level should be around 2.0 during the establishment period, and you can raise it to 2.6 once the roots are established.

Yes you can!

Yes definitely! You can use a variety of different media with DWC. It all depends on the setup you have and what is most appropriate. For example if using net pots you don’t want to use a medium that is so small it will fall through the pot and into your reservoir. So in this case hydroton pebbles are a good option.

It seems like you are having so very large fluctuations in your numbers. Can I ask what the size of your water reservoir is?

@@proponics I use a very small water 3L reservoir only. Is it may be due to the small water reservoir ? I adjusted the pH to 6pH but it seems that the nutrient level has dropped too much. And I used Potassium Hydroxide for pH up dan Citric Acid for pH down.

No, at that size you should be able to get accurate readings pretty fast. With a lager reservoir it would take longer for everything to settle and to get an accurate reading. What nutrition are you using?

This is very much a system and plant specific situation. Ultimately you are aiming for a situation where the roots of the plants can’t dry out, otherwise the plants will die. So if you want to do timed irrigation then you must ensure that the medium you are using to support your plants retains enough water until the next irrigation cycle. Or in the case of aeroponic, that the interval between cycles isn’t so long the roots will dry out. So low pressure aeroponic cycles for longer periods/intervals, or high pressure cycles for shorter periods/intervals.

@@proponics i see, thx.

Using a 500 scale (1 EC = 500ppm) between 1000 and 2000 depending on the stage of growth and type of tomatoes.

Always best to check pH after adding nutrients to the solution because they can alter the pH.

Thank you!

It really depends on what type of plants you are growing! But we have a crop chart here that gives you some optimum temperatures for a few different varieties: proponics.co.uk/blogs/plants-and-vegetables/hydroponic-crop-selection-an-easy-guide?_pos=1&_sid=2d78b11a0&_ss=r

While it's certainly possible you have to be cautious of how precise your measurements are, any additional compounds that may affect the plants, and a lack of long-term stabilisation, to name a few. Balanced solutions that are specifically for hydroponics are designed to mitigate all of these issues.

The perfect solution

Kelvin as in temperature?

@@proponics as in colour and how many lumens ?

@@proponics like 6500k / cool white light is best for leafy vegetables like that, which colour and the Kelvin best for onions growth

Blue Light (450-495 nm): essential during the vegetative stage as it promotes leafy growth. Red Light (620-750 nm): important for flowering and bulb development. As the onions mature and start forming bulbs, increase the proportion of red light.

I get you. They both have their pros and cons depending on where you are growing, budget, etc. check the article linked in the description for more information.

We’ve got a number of aeroponics vids on the channel. Check them out!

Well said!

Yes this is a great solution regarding support. This is not to say don’t try it or engineer a solution, simply that it might present more challenges or that there might be a system that is better optimised.

Excellent idea, let me know how it works out!

@@proponics Hi. Very simple, I have put my water tank 50 liters in an 80 liter empty container. I have to say that all my NFT are on my terrace, sunny all day long. I don't know how it would go when the heat wave comes, it will probably be 30-40 celcius soon. It works now and keep the temp 22-25 grader the last few days at 30 degrees. Regarding this in the Emirates, indoor slalom, there is a documentary that I have seen on television. I'm not that good in English to explain it better.

Yes your plants should always have a source of nutrition as long as they are growing. That said you don't need to feed them up to the very moment of harvest, but you don't want to leave it too long. Some growers chose to reduce the amount of nutrient they use or "flush" the nutrient completely (we have a video on this I will link below). It's important to remember that the type of nutrient needs to be different as well during the fruiting stage. Most commercial mixes will be label as "grow" or "bloom" and you want to use "bloom" when flowering and fruiting. Bloom nutrients are basically higher in phosphorus. As for consuming plants that have been grown using hydroponic nutrients, yes they are completely safe to consume providing you have been using nutrients that are approved for use in hydroponics. DON'T however ingest hydroponic nutrients by themselves. Video on hydroponic flushing 👉🏻 ruclips.net/video/tgDg7noR9-w/видео.html

For more help join us on Skool as part of The Hydroponics Community www.skool.com/the-hydroponics-community-1895/about

It will simply effect the plants across the frequency of how often the temperature is changing. So while I can’t see the up and down in the temperature having any specific unique impact, it will simply just have the compounding effect of all the ups and downs put together over time.

@@proponics Thank you. Thi is a big question, it depends on many things-parameters and no easy to consider or locate for a solution. Hier in Greece already over 30 celcius. Have a good time Man.

No worries, also remember that sudden changes in temperature can cause shock for your plants are risk their health, so the more consistent you can keep the temperature the better and if there is change it's always better that it isn't sudden or extreme.

@@chrisAk-ci2gr for more help join us on Skool as part of The Hydroponics Community 👉🏻 www.skool.com/the-hydroponics-community-1895/about

Womp Womp, its cheaper and faster than hiring an artist and waiting days to get a product back.

Great question! Definitely need to be watering every few hours, and altering the frequency as the plant develops.

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A rise in EC can be the result of the plants needing more water than nutrition at a particular time. If the water level drops without nutrient uptake it will increase EC. This can also happen as a result of water evaporation. As for tabulating we’ve got a table you can use here 👉🏻 proponics.co.uk/blogs/nutrients/g

​@@proponics Thank you. The site is very informative

That never crossed my mind, what made you think so?