brown spots

hey I have brown spots on my leavessss they are not cool here are some pics. Two of my plants have these under the same conditions as the others. What do you think the problem is?

bump praytell

have you looked on the underside of the leaves for bugs? how long did this take? get a magnifying glass and good light and look real close.

Looks like a calcium deficiency to me.... here is a great link which puts pics with problems...

http://www.icmag.com/ic/showthread.php?t=11688

out.

this could be a sign of too much MG (magnesium) or a deficiency of manganese... FoxFarm I know has a product that contains manganese, but in the mean while i would consider a flush( 3 gallons per one gallon of soul). Check out local nurseries even lowes, wally world and look for a nute/fert that contains manganese, then give them a foliar cleansing! If you've had any lower leaves going yellow, and it doesn't have to be present rite now, I would defintely consider this to be a magnesium overdosing. What nutes are u using??? What strength??? soil? PH? Like Crackerjax said calcium causes the soil to become too acidic. Resulting in a defiency of Mg..... However you would be having major curling upward and your blades would be dying...

Having plants that are deficient in manganese can turn the young leaves into spotted (mottled) yellow and or brown areas on young leaves. Dead (Necrotic) yellow spots form on top leaves, while the lower older leaves will or may have gray specks and or spots. Symptoms can include yellowing of leaves while the leaf veins can stay green. Can also produce a chequered effect. As the plant gets newer growths the plant will seem to grow away from the problem, that’s why the younger leaves may be unaffected. On the top of the leaves, brown spots can appear. While the severe areas of the leaves turn brown and wither. Parts Affected by a Manganese deficiency are: Young leaves.
Too much Manganese in the soil will cause an iron deficiency. The blotchy leaf tissue is caused by not enough chlorophyll synthesis. Your plants will seem to have very weak vigor caused by the excessive amount of manganese.

Problems with Manganese being locked out by PH troubles

Soil ph of over 6.5, High iron soils, Low nitrogen Soils, Dry weather
and compacted soil.
Soil
Solution to fixing a Manganese deficiency
Foliar feed with any chemical fertilizer containing Mn., or mix with water and water your plants with it. Any Chemical/Organic nutrients that have Manganese in them will fix a Manganese deficiency. (Only mixing at ½ strength when using chemical nutrients or it will cause nutrient burn!) Other nutrients that have Manganese in them are: Manganese chelate, Manganese carbonate, Manganese chloride, Manganese dioxide, Manganese oxide, Manganese sulfate, which are all fast absorption. Garden Manure, Greenssand are both good sources of manganese and are medium/ slow absorption.

Not Magnesium.


out.

hey thanks for the replies, I use VF11 for micros, it seems like it was probably a temporary thing. I left the plants to wick up some water when I went out of town and I think that one ran out of water / nutrients while I was gone and maybe that is what it ran out of first. I'll just keep on using my regular blends since it doesn't seem to be getting worse but there is yellowing so it probaby is manganese deficiency.