Help! Leaf Burn/Yellowing
Greetings! Let me preface this by saying my problems are not strictly confined to my tomato plants, but they provide the best pictures for illustration.
I have a variety (30+) of vegetables I've put into raised beds filled with high quality loam mix (sand, bark, mushroom compost) from a local nursery. About half of the plants were started indoors under lights for 4-6 weeks and then hardened off before transplanting. These were all stocky, full of leaves and vigor. The other half were started from seed in the beds, and EVERYTHING sprouted terrifically within 3-4 days of sowing.
Since emergence/transplant however, everything has seemingly stalled and stunted with no apparent growth in the past two weeks or so. We got a heavy four or five days of rain so at first I thought the roots may have just been a little wet, but after a week without watering the soil has nearly dried and the plants show no improvement. The largest of the plants have actually started to deteriorate, yellowing and drooping on the lower leaves (while the upper reaches remain healthy in appearance). The tomatoes have also developed burn spots.
Now I'm suspecting that the organic matter in the mix may be too "hot"...? How do I salvage three beds fully planted (100+ sq ft.) so that I don't lose months of tedious indoor growing and record keeping!