does hps cause stretch

[medleaf]

Well I hear a lot of people say that hps causes stretch but I have not found that to be the case. Here are some seedlings I started on september 12th, they went into soil on the 14th and have been under a 600 w hps ever sense. That is basically 3 weeks so you can decide for yourself here is what i found.

leaf

 

[Hank Hemp]

When I read the title I thought that you meant during flowering. I've never put seedlings under HPS. Sorry

 

[mellow yellow]

hps for flower

 

[Japanfreakier]

They looked a little stretched to the first node and then not very big at all for being under a hps and 3 weeks.

 

[Chimera]

You'll see them stretch more as the plants grow, and compete for light. looks like you have an indica dominant set though, which naturally stay stockier.

re: HPS stretch- it;s not actually that HPS causes stretch, it's the lack of blue wavelengths in your light source. Hortilux bulbs have sufficient blue to limit the stretch.

Hope that helps,
-Chimera

 

[medleaf]

I dont find much streach at all and seeing as hps provide more lumens per watt i feal it is the best answer and the only type of grow light i own. This was actually 8 different strains. I find the stems are stout and the internodal spacing is great. I just dont see why anyone would use a mh set up unless it was free. peace leaf

 

[Japanfreakier]

Have you grown with MH? used a mixed spectrum?

 

[Chimera]

mh bulbs have more PAR watts, more of their enegry is absorbed by the plants. HPS lights have more lumens, but a smaller amount of those lumens are converted into useable energy via photosynthesis.

Indoors, mixed spectrum is the only way to grow afaic.. provided your room has more than 1 light. If not, grab a hortilux HPS bulb..... just my opinion.

-Chimera