Friends, I flushed these a week ago and added back nutes the next day. The slurry test yesterday for nitrogen and phosphorous show slightly deficient but potash/potassium (k) was severely deficient.
I’m using the FoxFarms bundle of Big Bloom, Grow Big and Tiger Bloom liquids plus their three low dose powder boosters as per their week x week schedule. Yesterday I did, however, double the Beastie Bloom booster (high in k) by using 1/2 tsp instead of 1/4.
Specifics below but I’ve had this problem before during flowering and as noted my spring water is very close to RO although very alkaline.
My questions: does this look solely like a K deficiency or is something else wrong? And, if it is just K, since it keeps happening should I continue to exceed recommended dosing of that element? (Only the rightmost of these four shows considerable damage but the others show early signs of it too.)
Thanks as always
Details:
Four sativa-dominant photoperiods from seed.
Week 6 of flowering.
2x4 tent is 75 degrees 35% rh
12/12 light schedule
Spyder sf 2000 led 200 watt
Lumens - 50,000
Fox farms ocean forest soil
Alkaline spring water with high ph and low tds.
Watering/feeding at ph 6.3 and using one tsp calmag and 1/4 tsp epsom with feedings along with FF’s recommended nutes by week
I’m using the FoxFarms bundle of Big Bloom, Grow Big and Tiger Bloom liquids plus their three low dose powder boosters as per their week x week schedule. Yesterday I did, however, double the Beastie Bloom booster (high in k) by using 1/2 tsp instead of 1/4.
Specifics below but I’ve had this problem before during flowering and as noted my spring water is very close to RO although very alkaline.
My questions: does this look solely like a K deficiency or is something else wrong? And, if it is just K, since it keeps happening should I continue to exceed recommended dosing of that element? (Only the rightmost of these four shows considerable damage but the others show early signs of it too.)
Thanks as always
Details:
Four sativa-dominant photoperiods from seed.
Week 6 of flowering.
2x4 tent is 75 degrees 35% rh
12/12 light schedule
Spyder sf 2000 led 200 watt
Lumens - 50,000
Fox farms ocean forest soil
Alkaline spring water with high ph and low tds.
Watering/feeding at ph 6.3 and using one tsp calmag and 1/4 tsp epsom with feedings along with FF’s recommended nutes by week
