Question about CFLs and timing...

[Humanrob]

I understand that a plant under CFLs will not grow as thick/dense/full in veg as one under HPS/MH, and I believe it will also increase in overall size more slowly.

But what I'm wondering about is maturation speed/timing.

When the common knowledge is that a particular strain finishes in 7-8 weeks, I'm wondering if that timing is light specific or DNA determined. Do plants under CFLs take longer in flower than plants under HPS/MH lighting to reach harvest time? Or is the amount of time a plant takes to reach full maturity more in its DNA, and two identical plants under each kind of lighting will both take 7-8 weeks, but the one under CFLs will have significantly less yield?

Thanks

 

[Geemoe918]

I understand that a plant under CFLs will not grow as thick/dense/full in veg as one under HPS/MH, and I believe it will also increase in overall size more slowly.

But what I'm wondering about is maturation speed/timing.

When the common knowledge is that a particular strain finishes in 7-8 weeks, I'm wondering if that timing is light specific or DNA determined. Do plants under CFLs take longer in flower than plants under HPS/MH lighting to reach harvest time? Or is the amount of time a plant takes to reach full maturity more in its DNA, and two identical plants under each kind of lighting will both take 7-8 weeks, but the one under CFLs will have significantly less yield?

Thanks

Good i was wondering the same thing as im going into week 7 of Flowering and no loud smell as of yet which is cool but make me ask the same question

 

[cjmade]

The smell depends on the strain - I had a single plant 7-8 inches tall stink up the house and with another strain now there's barely any smell outside of the box.
And for the lights - I'm not sure, but I think it shouldn't matter.Lower yield? Well I haven't seen much mh/hps 100w grows as well as no at all 400w(actual watts) cfl grows, so it is hard to compare. People generally tend to say "proper lights yield better", well I'm not sure. Take like 20 25w cfls and position them very closely around your plants and see what happens.

 

[Humanrob]

The reason that I asked the question is that I'm trying to loosely plan my next grow, and I'm trying to figure out approximately when this one will finish. If I should add 25% or 35% anticipated time to flower (relative to the claimed time) because I'm using a lighting that does everything more slowly, then that would be good information.

But as time goes on, my grows are at least somewhat answering my question. I have two closet grows, with the same clones, and one is doing really well and the other isn't. They are both in flower, but the one that is doing well looks like its one to two weeks ahead of the other one in developing bud size. That would indicate that environment has more impact than genetics in speed of flowering... at least in this case.

 

[bryleetch]

The reason that I asked the question is that I'm trying to loosely plan my next grow, and I'm trying to figure out approximately when this one will finish. If I should add 25% or 35% anticipated time to flower (relative to the claimed time) because I'm using a lighting that does everything more slowly, then that would be good information.

But as time goes on, my grows are at least somewhat answering my question. I have two closet grows, with the same clones, and one is doing really well and the other isn't. They are both in flower, but the one that is doing well looks like its one to two weeks ahead of the other one in developing bud size. That would indicate that environment has more impact than genetics in speed of flowering... at least in this case.

Indeed, a constantly high stressed plant will always take longer to flower and just develop in general compared to a perfectly healthy plant with nothing delaying growth.

As for your original question, I took a clone of the last plant I flowered out under CFLs before I made the change over to LEDs. That clone took the same amount of time to finish as her mother so in that case the light source didn't make a difference in flower length.

 

[Final Phase]

Thinking about nature... The sun is a constant that only varies due to weather. A plant that grows in shade will get less light but will still finish at the same time as nearby plants that are getting full sun. The one in the shade will produce less.