3 weeks in flower,help me save my first medical grow!

Attachment 275810Attachment 275809Attachment 275808So calcium or phosphate is what I think...the problems are. The strain is strawbery cough and I can't seem to stop this even after a good flush, cal/mag feedings and also extra bloom. I'm lost and this is my first med grow,I'm keeping a log to learn everything so detail replys wou;d be outstanding.

strain-strawbery
soil-pro mix
temp-68-77
ph-6.7
ph run off-6.1-6.4
lights-2
watts-1000
time-12-12

Thanks in advance!
http://boards.cannabis.com/images/misc/pencil.png

Take a real good look under the leaves.
It looks like you might have spider mites.

you should fill out the plant troubleshoot form so it gives us a littlre more background information to answer your question.


From my experience it looks like a calcium-magnesium defiency or your ph is off. you could have a cal-mag defiency strictly because your ph is off.


The rust brown spots on your leaves have me leaning toward cal-mag . If you overfertalized you would see some tip burn, which does not look like your problem.

Try a light foliar spray then after it soaks in put your fan on a higher setting to make sure the plants dry out since you have some early flowering going on. It won't solve the problem but may help you identify it so you can increase whatever it is they are lacking. You can buy cal/mag/zinc vitamins at any store, crush them up and use them in a foliar spray this way you have isolated the nutes. The leaves won't repair themselves but should prevent further symptoms.

Thanks for the reply's guys. I can tell you I have not a bug in sight. No mights,trich,fungi ect. I guess what I should be asking is what is a good PH? I thought 6.7 was a safe zone? I'm hearing 6.5-5.8 from people so I'm not sure what to do here.
I will try and search for the form to give more info.

Thanks!

What is your soil ph? Not the water going in or the runoff, the soil????

How far are your lamps from your plant tops??

Size/area of grow space?

That's a nute problem. The middle photo looks like magnesium def, with that golden yellow spotting. I've never seen it quite so advanced and if that's it, it could be why the yellow spots are turning brown. You're probably seeing alot of golden yellow spotting at first that turns brown I bet. Avoid flushing. The best way to avoid nute problems is to do what's necessary at the beginning and avoid changes. The best way to avoid nute problems, in my opinion, for a beginner is to use the powdered ferts like Foxfarm fruit and flower, tree frog, Dr. Earth. These ferts have the bacteria and fungi necessary to break the large molecules down to a level that the plants can absorb. One half to one cup of fert for every two gallons of soil is plenty, one cup is actually too much but it won't hurt the plant because it takes time for the bacteria to break the stuff down, so think of it as a natural clock, feeding at the right time. Some people like soils like Miracle Grow but it's kind of hot to use and draws a few complaints. But some people like using it.
To attempt to solve this problem soon (and if I'm right about it being mg def, the a spoon full of epsom salt in a gallon of water should do it. Just water until they have enough, you don't need to give the entire gallon.
Another option is to try a fert that has pretty much everything in it, like Supernatural Terra or Dynagrow. It won't take much, just follow the directions on the container. The thing about soil grows is that the manufacturers don't necessarily say how often to feed. You could use a Foxfarm liquid fert or Botanicare and follow the feeding schedule, but I don't recommed this for beginners. Putting powder fert in your soil and letting nature do its thing is best. Just add water when dry.

A nutrient prob is a great diagnosis. I use Pure Blend Pro in soil and dont have the availability issues but i use a glucose and sucrose solution every 14 days to avoid salt lock. Its the only way for me. Organics is the key. Chem ferts are just so unforgiving. I Also use liquid karma in every stage and as a foliar feed in the veg stage. I hope your issue works out.