well, i dont know, but if they are to big, they may snap a branch if it gets to heavy, found this pic, looks like a small wooden or fibergrass dowel rod to tie the tops to, to hold them up.
well i ordered seeds, got some real good ones, but didnt get the 1024, maybe next time. got these from herbiespicknmixseeds.com
1 Seeds Per Pack 1 £5.40 (1x $8.58 ) KAN12-F-5-10-1 Blue Mataro, Blue Moonshine x White Widow x La Blanca
1 Seeds Per Pack 1 £9.20 (1x $14.62) DNA034-F-6-1 Kandy Kush, OG Kush x Train Wreck (T4)
1 Seeds Per Pack 1 £7.38 (1x $11.73) WFS92-F-1 Medical Collection Afghan Kush x White Widow
1 Seeds Per Pack 1 £6.70 (1x $10.65)DNA035-F-1 RockLock, Warlock x Rockstar
£6.75 - (International Delivery) $10.24 for shipping Total: $55.82