Here is the link to the UnMD planting time guide for veggies https://www.extension.umd.edu/resource/when-plant-vegetables/ For your seedlings: Yes — I would plant some of them, but I would not count on all of them recovering. The good news is that the problem is much more likely to be too little light than a fatal disease. The main issue is that some of your plants may not reach maturity; they needed to be planted earlier for fall yield. Looking closely at your photo, the seedlings are extremely elongated and pale, especially the cucumber and several of the brassica seedlings. They're "leggy" because they have been stretching toward light. What I would do right now 1. Don't bring them back into the house. If they have been outdoors, keep them outside. Bringing them indoors can introduce the little insects into your house and will put them back into weak-light conditions. 2. Give them much more light. Put the trays where they get several hours of direct morning/afternoon sun. The seedlings are so stretched that increasing light is the most important thing you can do. 3. Transplant the strongest ones rather than throwing them all away. You can actually bury the long stems of many of these plants deeper than they currently are. • Tomatoes: bury deeply — excellent recovery • Kale, Brussels sprouts and other brassicas: bury the stem somewhat deeper, up to the lower leaves. • Cucumbers: be more careful. Don't bury a long section of cucumber stem deeply; transplant with the root ball intact and support the plant. • Peppers: don't bury the stem deeply the way you would a tomato. Plant approximately at the existing soil level. For the very thin seedlings that are essentially white thread with tiny leaves, I'd discard those and start new seeds. They're unlikely to become good plants. The white bugs This part actually may be less alarming than it looks. If the bugs are tiny white/gray specks that live in the moist potting mix and quickly disappear or jump/run down into the soil when disturbed, they sound very much like springtails or soil mites. Springtails are extremely common in damp seed-starting mix and generally don't hurt healthy seedlings. I would not keep spraying neem oil simply because you see these bugs. Very young seedlings can be sensitive to neem, particularly in strong sunlight and hot weather. If the insects are instead tiny flying adults, or you see small translucent larvae in the soil and the seedlings are collapsing at the soil line, that's more suggestive of fungus gnats, which is a different problem. One thing I'd change immediately Your seed-starting mix looks quite dark and wet in the photograph. With seedlings this small, don't keep the mix constantly wet. Let the surface become somewhat dry between waterings, then water thoroughly. Constantly wet mix + weak light is a perfect environment for fungus gnats, damping-off and weak roots. And I would start another batch I wouldn't rely entirely on these seedlings. I'd transplant the best ones and simultaneously start fresh seeds, particularly for your fall crops. The brassicas (especially kale and Brussels sprouts) are worth saving and/or restarting. They can be quite forgiving once planted outside. My recommendation from this particular tray: Seedlings What I'd do Kale Definitely transplant strongest ones Brussels sprouts Definitely transplant strongest ones Cucumber Transplant the best few; start a few new seeds too Very thin/white seedlings Discard and reseed Strong green seedlings with decent leaves Keep and transplant And don't be discouraged — leggy seedlings can look terrible and still recover surprisingly well once they get adequate light and are planted properly. Good luck Len