Plants per square meter: Seedling vs Clone

By: Simon

Seedlings will grow taller than clones of the same plant. They have a vigor which clones dont have. I'm not talking about clones (cuttings) but about seedlings. The plants grown from seeds.

If you want to have them 1 metre tall then you should give them about 3-3,5 weeks veg time. 
For Seriotica wield a formula of "at harvest time they will roughly reach three times the size they have when you start 12/12". 
This is a rough statement because type of substrate (soil/ inert substrate) or light (lot of red light increases stretching, HPS has more red light for instance) have an influence.

For AK-47 use a formula of "the size they have when flowering starts will be four or 5 times that at the harvest time". 
Which means you should germinate the AK-47 at least one week after the Seriotica if you want to grow them in the same grow room.

How many plants per square meter is also different for a seedling or cuttings of that same seedling. The seedling will grow bigger and wider than cuttings of that plant. 

There is also differences between strains/ cultivars. 

And finally, if you top/clip a seedling then the side buds (four or six of them) will all be of the same height. Then you have four to six buds in stead of one big top bud being the highest of the whole plant. 

Clipping the very tip at the start of the flowering time (till two weeks after, not longer) will give you multiple buds of the same height which will be lower than the main big bud would be. 
This could be an advantage if you think the plants will be too big. 

Like you could have with AK-47 growing in the same grow room. If you clip the AKs then they will stay shorter and will be more in line with the height of the unclipped Serioticas. 

How many plants per square meter depends on the size of the plants.

You can have one to may be three per square meter. I think four is already too much unless the plants stay quite small. 

With clipping you can keep the plants a bit smaller. So you could do this when they seem to be getting too big. Usually you will start to realize this when the plants are already in flower for some time, like three, four weeks. 

Clipping is advised till two weeks after start of flowering, but if needed to keep the plants smaller, you could also do it three or even fopur weeks after the start. Only it will affect the size of the yield because you clip away the main bud which was on its way to become the biggest bud.