Just got my hands on a few seeds of a strain called "Jack Flash." Supposedly a Jack Herer hybrid with a high yield. Does anyone have any experience with this strain?

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jack is a sweet one so I wouldn't doubt that any cross with it would be killer

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jack flash is a nice tasting bud mate, have grown it serveral times now. Always been a popular strain with experienced growers and people ' in the know'. Has a very strong and likable aroma when smoked .

Only advise I will give you is to watch out for spider mites - for some reason they love jack flash so make sure you spray regularly against them - good luck.

this is from a list of over 900+ strains that I have.....

Jack Flash (Sensi) Jack Herer X Super Skunk

And this is taken from a seed reivew site that I have for reference purposes.

RegionEuropean Strains - Holland and Switzerland
StrainJack Flash
TypeMostly Sativa.
OriginHolland
BreederSensi seed bank
DescriptionPic supplied by ?
SpecificationsIndoor
Yield up to 125 gr

Flowering: 50-60 days. Height: 140-160 cm.

Sensi seed bank
Comments
Mostly Sativa. The Jack Herer hybrid that is easy to grow. Everyone who is growing Superskunk will now choose this fruity Jack taste with a flash of Haze. It is recommended you select the medium - long flowering plants for finest quality and results. Sensi seed bank

Jack Flash does go a bit long in the flowering, it grows in two types one very Sat/Haze influenced, tall 5'-6' with huge "Heads on Sticks" that dried at over 1 oz. each! there were 5 of them on one lady in a 5 gal pot, she took about 76 days, but was worth every day.

The other type grows very Indica-like, there was one special lady like this type, that was very fruity with a nice trippy high that gave way to a indica high after the first hour and the indica-dom. takes about 60 days to flower, also very well worth the wait, several connoisseurs said that it was amongst the best Indica they had ever smoked, and the taste cured is fantastic. And the strain is very easy to take care of. It was really nice, and it yields great in both forms.

Out of 7-8 different strains grown Romberry and Jack Flash are definite repeats, as they are both in the Veg closet again. There's really only one place to get Sensi stock (IMO) but the price is OK considering they give ya 16 beans, in that respect there only a/b 5$ each. Sorry for the long post but its a favorite and I wanted to give ya my $.02.-Budm

Afoaf has grown and continues to grow Jack Flash, its a great strain, although variable, IMO the variations are unique and all are quality in there own way. Here's the way the first grow went, 3 ladies were in pots of BCGA's Super Soil recipe, there were 3 different ladies, one was in a 5 gal pot she was a haze dominated phenotype, she grew out in a "heads on stick" fashion, big huge heads, she was toped once at the 6 node, she grew into 6 big heads, each dried to 20-35 grams she yielded just over 5 oz's, of great tasting wake and bake, uplifting sativa smoke.

Another lady was sort of the runt, she was in a 3 gal pot also pinched at the 6th node, she had more of a indica phenotype, nice tight colas with red pistils, great smoke very fruity, but yield was bad, at about 20 grams.

The 3rd lady was awesome, also in a 3 gal pot, pinched at the 6th node, she grew the densest nugs, smelled like lemon, tasted like lemon/hash, and the high was awesome, trippy and thought provoking, but its best attribute was its wonderful taste, she yielded about 1.5 oz. All said I really like this strain. The haze influenced lady was crossed with a Posi Big Bud in hopes of bring down its size (5.5') and flower time 63 days under 80 watts/s.f. of mixed spectrum light.-Budm

This is a really good plant. it finished at 50 days has a lemon taste/ with a peppery aftertaste. High is UP with no sleepiness. I was afraid that it would be too similar to my Cinderellas due to their background, but the Jack Flash is very different in taste and high. jack flash is lemony and Cindy is like pineapple . one is sweet while the other is sour.

The only drawback is an increased paranoia level. The up high does also create a slightly discomforting "edge" , but Its mixed in with a lot of laughing (which I like), and creativity (strange but intriguing ideas), aphrodisiac effect ( a must, he he)and yield (big calyxy buds) I highly recommend this for someone looking for an up high, lemon taste, and good yield. - Triage

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do you use a cold press neem oil spray to deal with them?

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"For art to exist, for any sort of aesthetic activity to exist, a certain physiological precondition is indispensable: intoxication." - Friedrich Nietzsche

neem oil will do the trick as a preventative measure, even misting the under side of the leaves regularly with just water will deter spider mites.
Howerver, once you have them it is a different matter. Use a miticide to hit them as fast as possible, increase humidity, and as a back up once you are happy they are gone add a dose of live predatory insects to mop up any remaining.

Jack Flash is a strong plant that can be grown indoors and outdoors. When given CO2 and up to nine weeks of flowering the harvest becomes more purple the longer you let it grow. I men real greenhouse purple. This plant fights any kinds of problems that other plants may get, powdery mildew for insrtance, the plant will never get. Fresh water the plant for a very long time at least three weeks to get the full flavor. Dry the fruit until it is crisp and breaks off of the branch easliy and enjoy.

Jack Flash.

soil grown, flowering start of week 5.

400w HPS.

Attached Images

jack flash flower week 5.jpg (66.6 KB, 77 views)

Looks like you got the sativa pheno there Dave. It's gonna make you wait, but boy will it be worth it. Looking nice and healthy. From what I have read, Jack Flash is very similar to Jack Herer but stabilised a bit more through back breeding of the strain. Jack Herer has 4 main phenotypes whereas Jack Flash only has the 2. Like I say, sounds/looks like you got the sativa.

I'm growing Jack Herer at the mo, got 3 girls from seed and they are all really quite different. It's incredible, but I just love them all. I think I have a heavy skunk pheno. A skunk/haze pheno. And an NLxHaze pheno. All leaning on the Sativa side. Apparently there is a heavy Indica pheno of JH and I'm hoping I have that one in my remaining 4 seeds

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yeah, reckon it will take an extra 2-3 weeks - but that is due to putting into flower from seed.

had no veg period - but took 3 weeks of flowering light to show sex.

still not a bad size at all.