Guide de Propagation et solutions nutritives
Source : Guide to Propagation and Nutrient Solutions
Presented by Jeffrey Winterborne - by Hydroponics
We’re here today to talk about jiffy pellets and rockwool for seed germination. [picking up rockwool and jiffy pellet] On my right (probably your left), jiffy pellets, compressed peat pellets, completely dry and on my left (probably your right), rockwool. Now rockwool is inert and sterile which means we have to supplement it with nutrient and also ph adjusted water to compensate its own consistency. Now jiffy pellets on the other hand has got everything you could require for seed germination or for even taking cuttings apart from the essential part which is obviously water. There’s enough nutrient in there, there’s enough compost in there to keep a cutting or a seedling going until it’s got a good healthy root system. Jiffy pellets are ideal for beginners, completely and utterly due to the fact that all you have to do [drops jiffy pellet into container of water] is soak them in water. ...
When they’re waterlogged, if you put a seedling in, the seedling will germinate, or the cutting will take, but because they’re so waterlogged, no air to the root system and the root system will starve resulting in possibly a dead plant. If not a dead plant, a very stressed plant.
Now we’ll let the jiffy go in the background while I talk you through rockwool. Now this is the more professional way to cultivate seedlings or cuttings, but it takes a few variables to iron out before you get it absolutely right. Now rockwool on its own with plain water wouldn’t be good enough, you have to supplement it with nutrient and then you have to ph adjust the water and the nutrient solution to compensate its own consistency, which we’re going to do right now. Now, an ideal nutrient to use for seedlings or cuttings [picks up bottle of Formulex] is one called Formulex. Now Formulex is superb; it’s tailor made for rockwool cultivation; however any Grow A and B nutrient will suffice as long as you make it up to a weak CF level. Now CF, TDS, PPM; they’re all measurements to verify the electrical conductivity of the nutrients in the water, in layman’s terms it means how strong the food is in the water.
How strong your nutrient is… Now Formulex is designed already to be very low in the EC value, ok, it comes with full instructions on the back and tells you the dilution ratio. Now you can follow that to the T and you’ll end up in the right ball park; what we’re going to use, [picks up meters] being more professional, are meters. Now, we have a ph meter [holds meter up] and we have a CF meter [holds meter up], also called a TDS meter, also called a PPM meter. It’s the same thing, it just measures how strong the nutrient is, in the solution. I’ve just poured approximately 4 litres of water into this container for you to be able to see. Now what we’ve basically got to do is raise or add enough Formulex into the solution to bring the CF level up to approximately 12. Anywhere between 10 and 12 will suffice. But what is a good practice to do [picks up CF meter, opens box, takes meter out] before adding any nutrient to your stock solution is just to test before you do so, [puts meter into container of water] the conductivity factor of the water without any nutrients in it at all. Now it’s given me a reading of 4, that’s a TDS level of 4. [takes meter out of container of water] What that means is, there’s basically a conductivity factor of 4 which is dissolved salts into the water already, but that is what they would call blind water or blind salts.
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Hydroponics Indoor Horticulture by Jeffrey Winterborne
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systèmes hydroponiques & cycles de culture ...Presented by Jeffrey Winterborne - by Hydroponics
We’re here today to talk about jiffy pellets and rockwool for seed germination. [picking up rockwool and jiffy pellet] On my right (probably your left), jiffy pellets, compressed peat pellets, completely dry and on my left (probably your right), rockwool. Now rockwool is inert and sterile which means we have to supplement it with nutrient and also ph adjusted water to compensate its own consistency. Now jiffy pellets on the other hand has got everything you could require for seed germination or for even taking cuttings apart from the essential part which is obviously water. There’s enough nutrient in there, there’s enough compost in there to keep a cutting or a seedling going until it’s got a good healthy root system. Jiffy pellets are ideal for beginners, completely and utterly due to the fact that all you have to do [drops jiffy pellet into container of water] is soak them in water. ...
When they’re waterlogged, if you put a seedling in, the seedling will germinate, or the cutting will take, but because they’re so waterlogged, no air to the root system and the root system will starve resulting in possibly a dead plant. If not a dead plant, a very stressed plant.
Now we’ll let the jiffy go in the background while I talk you through rockwool. Now this is the more professional way to cultivate seedlings or cuttings, but it takes a few variables to iron out before you get it absolutely right. Now rockwool on its own with plain water wouldn’t be good enough, you have to supplement it with nutrient and then you have to ph adjust the water and the nutrient solution to compensate its own consistency, which we’re going to do right now. Now, an ideal nutrient to use for seedlings or cuttings [picks up bottle of Formulex] is one called Formulex. Now Formulex is superb; it’s tailor made for rockwool cultivation; however any Grow A and B nutrient will suffice as long as you make it up to a weak CF level. Now CF, TDS, PPM; they’re all measurements to verify the electrical conductivity of the nutrients in the water, in layman’s terms it means how strong the food is in the water.
How strong your nutrient is… Now Formulex is designed already to be very low in the EC value, ok, it comes with full instructions on the back and tells you the dilution ratio. Now you can follow that to the T and you’ll end up in the right ball park; what we’re going to use, [picks up meters] being more professional, are meters. Now, we have a ph meter [holds meter up] and we have a CF meter [holds meter up], also called a TDS meter, also called a PPM meter. It’s the same thing, it just measures how strong the nutrient is, in the solution. I’ve just poured approximately 4 litres of water into this container for you to be able to see. Now what we’ve basically got to do is raise or add enough Formulex into the solution to bring the CF level up to approximately 12. Anywhere between 10 and 12 will suffice. But what is a good practice to do [picks up CF meter, opens box, takes meter out] before adding any nutrient to your stock solution is just to test before you do so, [puts meter into container of water] the conductivity factor of the water without any nutrients in it at all. Now it’s given me a reading of 4, that’s a TDS level of 4. [takes meter out of container of water] What that means is, there’s basically a conductivity factor of 4 which is dissolved salts into the water already, but that is what they would call blind water or blind salts.
La suite .... Transcript Propagation
Les vidéos en ligne:
Plus d'infos avec le livre de Jeffrey Winterborne et son guide de propagation et solution nutritives :
Hydroponics Indoor Horticulture by Jeffrey Winterborne
- Retour au Vidéos de Culture hydroponique