ICMag with help from Landrace Warden and The Vault is running a NEW contest in November! You can check it here.
Prizes are seeds & forum premium access. Come join in!
Yea Ive also tried swiching plants for 12/12 for 1 day then back to 18/6 pre flowers will show up within 10days but the plant nver comes out of vegg. SamSkunkman has used this technique for 30+ years. I think he mentions it in a few hash church episodes.
interesting, i'm sure paying for tests will be worth it for some...
Im in the UK, but would be unlikely to pay much for a test even if available.
My cheapskate method - when the young plants have 4 or so nodes, put them into height order. The tallest are likely to be males and the shortest the females. Last time i did this the shortest, numbered 1-6 were all female. the tallest, numbered 7-10 were all male.
so if the seeds aren't costing you loads of money or you have plenty of them.... just throw the tallest of the plants away and it is very likely that they will mostly have been males.
Obviously for best results the plants need to be grown in a uniform manner.