Had this show up reciently in one variety:









I was suspecting a nutrient toxicity, but which one. The last soil and tissue lab tests lookd good, though they were last week, taken off a different variety. Any thoughts?

Thanks
Chuck

Hi Chuck -

We have observed similar symptoms on the newly mature foliage as you are seeing and we have attributed the burn to low phosphorus in the media and tissue. Marginal burn like this can also be seen if the EC is high and the plants were allowed to dry. Royalty White does seem to be more sensitive to excess salts.