Once you till never put down any type weed killer. If you put in plants you can use a pre-emergent. But not in any area where you are planting seeds. You can always mulch to help keep the weeds down some.

WEED MANAGEMENT 1. Know what a weed is. Weeds are pioneers. They are natures way of covering disturbed and bare ground. 2. DonÂt disturb the ground. Except for actually planting new plants or cultivating for a new vegetable garden or flower bed, avoid breaking the surface of the soil. That includes avoiding pulling, digging, tilling to remove weeds. Yanking out even the tiniest weed makes two mistakes. It brings up weed seeds that have been accumulating at the deeper levels of your soil where they have been too deep to germinate. It also creates a disturbed bit of ground that new weed seeds blowing in find suitable for setting anchor. An additional note: weed pulling disturbs the roots of the desired plants nearby. Evere wonder why people who pull weeds are ALWAYS pulling weeds?! 3. Cover the ground. Mulch newly planted areas, vegetable gardens and annual flower beds. The best mulch for smothering weeds is a semi-composted organic material of medium diameter particles (about ½-inch) that is applied four to six inches thick. DonÂt skimp. Contrary to popular belief, geotextile fabrics (plastics, "landscape cloth") do not work well in the long run and actually lead to more weeds. Plant living groundcovers to "finish" the landscape and garden. Use low, dense, mat-forming groundcovers to truly cover the ground completely. Some of the most effective weed-suppressant groundcovers include Acacia redolens, Campanula poscharskyana, Cerastium tomentosum, Dymondia margaretae, Gazania rigens (gray-leafed trailing), and Thymus polytrichus ÂPink ChintzÂ. Plant other plants (low, dense, spreading shrubs and/or full clumping perennials) densely enough to leave no room between them. The idea is to cover the ground so thoroughly that no weed seeds can find their way to the ground. Those that do make it to the ground cannot make their way up. And those very few that do make it up canÂt compete well. 4. Hoe weeds. When weeds do come up in open ground, the best way to eliminate weeds for the long run is to "shave" them off with a sharp hoe. A Dutch or onion hoe is ideal; these have shallow but wide blades that work as does your razor blade. Hoeing works on weed seedlings. The larger the weed, unfortunately, the more difficult it becomes to actually be able to scrape them off with a hoe. Use the hoe as you would a razor, scraping toward you with the blade level from side to side against the ground and the handle tilted up enough to allow the sharpest part of the blade to cut at the base of the weeds. ItÂs important that you sharpen the hoe blade regularly with a fine rasping file. You keep your best kitchen knives sharp all the time; why not your hoe. The soil is best hoed when pretty dry. The hoe doesnÂt cling to the soil and neither do the weeds. Hoeing works for all young weeds. Young annual weeds (our most common type) once hoed, do not return. Perennial weeds will re-sprout from storage roots, tubers, underground stems and the like. The resprouting does, however, use up the food in the storage organ, thereby weakening the plant and a second hoeing of these, within a week of their resprouting will rid the plant of its ability to photosynthesize (which puts more food back into the storage organ). With older perennial weeds, the storage organ will continue to send up a new sprout and your persistent hoeing will eventually totally exhaust the organ. Where hoeing is impractical (tight spots, flower beds, containers), use a snipper of an apporpiate size. yeah, it works and it really isn't that much work, in the long run. I do it. 5. Mow weeds. Where seasonal weeds have grown too tall for a hoe to scrape them off easily, mow them down with a regular lawn mower. If they continue to grow, mow them again. Repeat. This works best if you mow them early, before they get too tall. The idea is to keep them mowed until beyond their blooming period, if you have to, so that they never set seed and become a worse problem or at least a continuing problem. Annual weeds eventually give up and peter away. Tall-growing perennial weeds also give up and fade away. Low-growing perennial weeds, however, are persistent  maybe even more vigorous -- under this process. Hoeing (early on, of course) and mulching are better methods for such low-growing weeds as oxalis, dandelions and many clovers. 6. Snip off the awkward weeds. Where you have small weeds popping up in the mulch or in the lawn, use any sharp tool to cut them off at their very base. No need to pull, which would either disturb the mulch or interfere with the lawn. This technique also is the best method for removing weeds from containers in which youÂre growing other plants. 7. Cut down the big stuff. Use a special tool called a weed cutter. ItÂs used much as you would a golf club, swinging with an easy stroke back and forth through the stems of the weeds. For those of you who are power-inclined, get out your power weed whacker. 8. Mow your lawn high. If you need to reduce or prevent lawn weeds, set your mower blades to 3 to 4 inches high. A tall-growing lawn shades out weed seedlings and produces a healthier lawn overall that better competes with almost all weeds. 9. Avoid frequent fertilizing of your lawn. Lawns do best with a good organic fertilizer once or twice a year. More frequent fertilizing, especially with quick-acting fertilizers and especially in summer feed the weeds as well as your lawn. 10. Water your lawn infrequently and deeply. Frequent shallow watering encourages weed seed germination. An aside: frequent, shallow waterings also increase disease problems as well as create a less drought and heat tolerant lawn. Joe

To clarify, I do hand weed IN the beds, this is just for around the beds. I only got some of the paths mulched before summer hit and the weeds went crazy. So the side of the garden where I got the mulch in has some weeds, but not a lot. The other side...the weeds are rivaling the okra in height. And the okra is doing great. I already tried glyphosate, but it didn't do much. It was 41% though, not the 47%. I will get some ammonium phosphate too. Once the weeds are beat down a bit I will cover and mulch the rest so hopefully this doesn't happen again!

OK, let me get this correctly. You mulched heavily, sprayed anything that remained, then put Preen on top. Since the green things you sprayed were probably flowers and the mulch can keep plants from coming up? Any of the flowers that put out seed will have their seed prevented from coming up. Where do you think the flowers are going to pop up from? From what was written sounds to me very few if anything will come up. Better to have given the advice to get a book on weeds and/or a book on garden plants so that the original poster can find out which plants are which. Unless you have clearly defined marked plants it would be better to wait until your plants start growing before adding the mulch etc. Pulling a few weeds will prevent the heartbreak of finding out that you pulled the plants you were expecting and left the weeds. It sounds funny but even experienced gardeners will destroy things that had been on their wishlists because they don't recognize them. Tulips and some of the iris's may be emerging. Start doing a patrol to see the new things that are emerging. If you don't know what they are introduce yourself to a neighbor to see if they know. Hosta's will be later and depending on the type of lily they could emerge any time from now until July. Not all things come up at once. Enjoy your new place, try to keep the weeds down once you find out which is which. If you are lucky the previous owners will have planted some of the spring flowers such as Jack n Pulpit that come up then disappear when it gets warmer.