What to do about rain-depleted soil?

This is a general question that may be hard to answer without more details. But let me try asking:
We in the Northeast have had near-record amounts of rainfall and lack of sunshine in recent months (just today about two inches fell in a very short time in my yard, according to my rain gauge) following a snowy winter. Many of my plants are wan and pathetic (some leaf color is a few shades lighter than normal, for instance). Obviously, nutrients have been washed out of the soil during this time. My entire and too small supply of compost is just about used up and I don't expect enough new compost to be ready for a couple of months. So what (without benefit of a current soil test) would be best to add to the plants overall (or at least to selected plantings)? Is there a quickie organic tonic that could be sprayed on leaves or dug in to give my annuals and perennials (many are designated as herbs and native plants and don't usually need much in the way of fertile soil) a boost for the last couple of months of the season?
I've been good about digging in balanced granular amendments, but it's a bit late for those now. I've done a little watering in of fish and seaweed emulsions to selected plantings, but gosh, I hate watering anything in right now.....! FYI, my soil is mostly sandy clay, with good drainage, and when there is sun, I get lots of it in most areas.
Thanks for any ideas.... Best, Tyra nNJ usa z7
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How about adding lots of composted loam and mulch?

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You could try Maxicrop, a liquid seaweed preparation, used as a foliar spray. http://www.maxicrop.com/Default.htm or http://www.biconet.com/soil/maxicrop.html or for sale at http://www.greenfire.net/hot/F063.html
No affiliation, etc., but I've used it in the past with great results. I was able to buy it locally at a natural foods store.
Cheers, Sue (struggling with the same weather-FINALLY picked a ripe tomato tonight) snipped-for-privacy@earthlink.net Zone 6, Southcentral PA

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Thanks, Cereoid and SugarChile. I appreciate the suggestions and have taken various steps to follow up. And good luck on coping with similar weather, which shows no sign of diminishing. (I'm not in a flood zone, so I'm counting myself lucky in that respect, for sure; it's a mile downhill to the nearest river.)
Best, Tyra nNJ usa zSLOSH
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