If you know the strain of the seeds, look for their website. A great example is Mandala seeds, their grow guide is as good as any around. For the record, they recommend for THEIR strains, under a 400w HPS, in soil, 3, preferably 4 weeks veg. Their yield guidelines are based on 4 wk veg time.
While you are here though, again, look for grows of that strain here. Narrow it down by searching in the forum that pertains to your grow medium. If you grow in soil, look in the soil forums etc. If you don't know the strain, look for 'bagseed grows' (minus ' marks).
The pattern I've seen here is it's rare to go more than 4 weeks, but there's plenty of exceptions.
Here's 1 way to approach solving this problem. I'll steal headband 707's 4 questions because it's a simple plan to follow to start with.
1. do you know the strain?
2. How much room do you have? this decides... (3) and (4)
3. How much light you will need
4. How many pots you can have at a given size that is, will you do SOG (Sea Of Green) or SCROG (SCReen Of Green)? Also strain dependent.
Have fun!
OldSkoolKlein
thanks for the info. I grew a few bagseeds when I first started that turned out to be male, but I wasn't getting any preflowers beforehand so I wasn't sure.. I can spot those balls from a mile away though, it always hurts to kill them, thats why I usually go female, but with landraces, you don't really have that option. I'm kind of hoping for a male I can use for some crossings of my ownHey Jungle.Microbes. Yeah males show sex in veg too. Usually before the females (not always). Be careful though as tiny pre-flowers can be mistaken for the opposite sex. I use a jewellers loupe to be sure and even then I double check a few days later to be sure. I prefer regular seeds to femmed so seen a fair few males. Its horrible having to cull them because half the time they are the healthiest/nicest plants of the bunch.