Does HPS add to finish time?

bravedave

bravedave

Well-Known Member
I started my short growing career using MH all-the-way because that is how I was instructed. Learning most run HPS during flower, I ran one for the first 50 days of flower in grow 4. Finishing with MH, running 25 days.

Point is the 75 days. All of my MH grows have been 70 days.

Slight differences in grows but most things identical and all major things.

It also seemed I could have waited even longer than the 75 days I did.

Bottom line(s);
Is it common for HPS to take a bit longer to finish than MH?

If yes, and you have actually run both ways with the same strain, how much longer?
 
farmerfischer

farmerfischer

Well-Known Member
I can't anwser your question, sorry, but can anwser mine? Was there more tricomes using the mh vs hps? I heard of people claiming the blue spectrum forms more tric's..
 
ISK

ISK

Well-Known Member
bravedave said:
I started my short growing career using MH all-the-way because that is how I was instructed. Learning most run HPS during flower, I ran one for the first 50 days of flower in grow 4. Finishing with MH, running 25 days.

Point is the 75 days. All of my MH grows have been 70 days.

Slight differences in grows but most things identical and all major things.

It also seemed I could have waited even longer than the 75 days I did.

Bottom line(s);
Is it common for HPS to take a bit longer to finish than MH?

If yes, and you have actually run both ways with the same strain, how much longer?
Click to expand...
it is not common for HPS to take a bit longer than MH, but that may be debatable, depending on your interpretation of what "a bit" actually is
 
S

Steelsurgeon

Active Member
Im no expert but "the rev" from skunk magazine has a tlo book out and he says that the hps doesnt allow the plants to absorb/use nutrients as effeciently as the blue mh. He does say that the hps will make the buds more dense but that the blue mh creates more trics and makes a better quality bud than the hps. So that could make sense that theyre less energetic so maybe they could slow down flower slightly
 
Richard Drysift

Richard Drysift

Well-Known Member
Steelsurgeon said:
Im no expert but "the rev" from skunk magazine has a tlo book out and he says that the hps doesnt allow the plants to absorb/use nutrients as effeciently as the blue mh. He does say that the hps will make the buds more dense but that the blue mh creates more trics and makes a better quality bud than the hps. So that could make sense that theyre less energetic so maybe they could slow down flower slightly
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I run MH in all stages of growth for this reason. I cannot say it is better than an hps; I notice very little difference in potency and bud density between the two. Either way 70 days in bloom seems like a normal amount of time; not sure one is slower in bloom than the other- think it may have more to do with strain/genetics. I do think the MH helps with uptake of nutrients from an organic medium only because the MH spectrums are closer to natural sunlight than HPS. However I've also run HPS with success as well; it really comes down to a matter of preference. Personally I like the mh better because it's not a weird orange color but I'd run HPS again if my mh shits the bed.
 
Velvet Elvis

Velvet Elvis

Well-Known Member
Richard Drysift said:
I run MH in all stages of growth for this reason. I cannot say it is better than an hps; I notice very little difference in potency and bud density between the two. Either way 70 days in bloom seems like a normal amount of time; not sure one is slower in bloom than the other- think it may have more to do with strain/genetics. I do think the MH helps with uptake of nutrients from an organic medium only because the MH spectrums are closer to natural sunlight than HPS. However I've also run HPS with success as well; it really comes down to a matter of preference. Personally I like the mh better because it's not a weird orange color but I'd run HPS again if my mh shits the bed.
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hundreds of thouands of growers use HPS for reasons specified above.
 
legallyflying

legallyflying

Well-Known Member
No it doesn't add to flower time. What HPS does add is weight. And weight is a very nice thing to add. The uvb thing is debated back and forth all the fucking time.

MH runs will result in reduced yield. Period.

The autumn sunlight passes through more of the atmosphere and is thus redder in coller. Plants flower in the autumn.

Focus your energy on proper environmental numbers, it will yield much better results than chasing light bulbs.

Cheers
 
hyroot

hyroot

Well-Known Member
It probably took longer due to spectral transition. When changing spectrum . Plants take up to a week to adapt to the new spectrum. You want the same full spectrum all through veg and flower just like the sun .

Late summer and fall the sun produces an infrared wave length of infrared light for a few min at sunset. Sending the plant into its phytochrome state , triggering flower response. That's why plants start flowering with long days. 14 hours of sunlight.
 
legallyflying

legallyflying

Well-Known Member
^ sorry bud, that is utterly and completely wrong.

1. The light is different all day due to the tilt of the earth... the light padded through more atmosphere all day long.

2. Flower response has nothing at all to do with the spectrum of light. It has to do with the amount of flowering hormone, which is called florigen.

Florigen is being produced by the plant 24/7. It does however RAPIDLY degrade in the pressence of light. So during your growth cycle florigen is building aND building... almost enough to trigger flowering and then bam, the lights come on (or the sun comes up) and it about ten minutes it's gone.

In the flowering cycle, it is dark enough, long enough, that the physiological response to flower is triggered.

That is why we don't just flip to 12/12 to flower. 10 hours of dark is enough to trigger flowering and tale advantage of more photosynthesis and starch production time with the extra 2 hours of light. Mid flower we go 12/12 amd then the last couple weeks we go 10/14. Mostly to get the room colder at night.

I mean, think about it. If it was a change in light spectrum that triggered flower production... how exactly would anything flower under MH bulbs?

Not bashing you, just saying. And now you know how it works.
:)
 
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hyroot

hyroot

Well-Known Member
legallyflying said:
^ sorry bud, that is utterly and completely wrong.

1. The light is different all day due to the tilt of the earth... the light padded through more atmosphere all day long.

2. Flower response has nothing at all to do with the spectrum of light. It has to do with the amount of flowering hormone, which is called florigen.

Florigen is being produced by the plant 24/7. It does however RAPIDLY degrade in the pressence of light. So during your growth cycle florigen is building aND building... almost enough to trigger flowering and then bam, the lights come on (or the sun comes up) and it about ten minutes it's gone.

In the flowering cycle, it is dark enough, long enough, that the physiological response to flower is triggered.

That is why we don't just flip to 12/12 to flower. 10 hours of dark is enough to trigger flowering and tale advantage of more photosynthesis and starch production time with the extra 2 hours of light. Mid flower we go 12/12 amd then the last couple weeks we go 10/14. Mostly to get the room colder at night.

I mean, think about it. If it was a change in light spectrum that triggered flower production... how exactly would anything flower under MH bulbs?

Not bashing you, just saying. And now you know how it works.
:)
Click to expand...

Lmao. You sir are completely wrong.

. Look up phytochrome response.

730 nm triggers phytochrome state within minutes.. at sunset or at lights out indors. So the plant needs only 10 hours of phytochrome state. Therefore plants can run longer days of 14/10 or 13/11 and flower and produce larger yields. Without the 730nm wave length it takes the plant 2 hours to go into its phytochrome state. Most indoor gardens lights don't produce this wave length after lights out. So that's why they need to run 12/12. So they still get the 10 hours of phytochrome state. If it were just hormones then revegging wouldn't be possible and all strains would be autos.
 
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bravedave

bravedave

Well-Known Member
Steelsurgeon said:
Im no expert but "the rev" from skunk magazine has a tlo book out and he says that the hps doesnt allow the plants to absorb/use nutrients as effeciently as the blue mh. He does say that the hps will make the buds more dense but that the blue mh creates more trics and makes a better quality bud than the hps. So that could make sense that theyre less energetic so maybe they could slow down flower slightly
Click to expand...
I am currently running A 600W HPS augmented by a 4'x4bulb T5 full of blues.
 
farmerfischer

farmerfischer

Well-Known Member
bravedave said:
I am currently running A 600W HPS augmented by a 4'x4bulb T5 full of blues.
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Ive always ran hps start to finish,, but then change to a convertible ballast so that I could run a mh buld during veg,, I just recently hung some blue cfls along the sides of my endless sky grow,,, the curious thing is that when I turn my plants, the leaves exposed to the blue cfls for aday or two are a lot darker in color ,,, . I've always heard and read thats its good to have a mixed spectrum,, I'm curious about the duel arch bulds,
 
bravedave

bravedave

Well-Known Member
legallyflying said:
No it doesn't add to flower time. What HPS does add is weight. And weight is a very nice thing to add. The uvb thing is debated back and forth all the fucking time.

MH runs will result in reduced yield. Period.

The autumn sunlight passes through more of the atmosphere and is thus redder in coller. Plants flower in the autumn.

Focus your energy on proper environmental numbers, it will yield much better results than chasing light bulbs.

Cheers
Click to expand...
And if yield is not your priority? I am back trying HPS,augmented. First attempt was ok but took longer and trichs were slow in coming compared to my MH runs. Trichs look better this grow with the added blues. 4 weeks today.
image.jpg
 
Velvet Elvis

Velvet Elvis

Well-Known Member
dual arc sucks. looked forward to its release for years and had to have one. lasted about 6 weeks and never again. yield was horrendous. but tasty
 
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