I disagree. I agree that it will come back, but poison ivy is perhaps the most sensitive plants to Round up. You can apply two drops on three leaves with a small paint brush, and the whole plant dies. I was able to eliminate it from my blackberries without losing a single bramble. Once the plant dies (3-4 weeks after painting), cut it at the base so it falls to the floor and starts rotting. But I would not plant carrots, lettuce or turnips in there the first year, only stuff that is well elevated, tomatoes, pole beans or cucurbita with a trellis, collard, broccoli, Brussels sprouts, okra, pepper, eggplant. PI usually grows in good soil. You could also lay down cardboard and mulch, and punch holes just for the plants. That will separate you from the PI, but pay attention not to touch the trowel blade while you plant. This second method is probably as good as the first.

Yes, I bought the book. Not worth buying. There's a forum on Garden Web---Soil, compost and mulch---where you can learn a lot more about sheet composting than you can from Lanza's fluffy book. Lanza irritates the heck out of me---copying Ruth Stout's gardening methods and never so much as a wink in her direction.

Ok, My only real problem with growing carrots in the lasagna bed is that you need to give em a fine seedbed, keep it moist and covering over with most mulches doesn't really work well for such small delecate seedlings. Here are my experiences with roots in lasagna beds so far. My first season of gardening here I didn't have much time/materials to set up proper beds so I got produce boxes and simply dumped in compost I got free from our county. Sort of a cross between lasagna and container gardening. I did get carrots though and it is wonderful to pull carrots from soft compost in your own garden. I also planted sweet potatoes in some of those boxes (down here they are actually perennial ground covers as well as food) and the ones that grew in those compost boxes were quite easy to dig up, the ones that rooted outside the boxes on the native soil are much harder to dig up. I'm moving the vines into a mound/ridge of compost with wood chips covering it. Hopefully this will give the sweet potatoes more space to grow in soft easy to work material before rooting in the ground. I've gotten turnips and radishes from those compost filled boxes too. I have lots and lots of onions and garlic just kinda pushed into lasagna beds all over. I usually just make sure they have some nice texture compost right under them so they can root easily. I now have some carrots growing in a layered lasagna bed. Probably the most important part of doing the carrots is keeping the surface of the soil moist till they get growing. I used some fine compost to make the top layer of this bed so I could plant seed. And cover with more fine compost. I have drip irrigation running right along next to that line of carrots. The seed tapes seem to work well for this sort of planting but as long as you can keep the surface of a fine seed bed gently moist, you can grow carrots in a lasagna bed. Keep in mind that really coarse materials in a bed where carrots are growing can cause some really strange shapes to your carrots. I'm planning to plant potatoes on a bed of compost and build up layers over them. I think a deep soft lasagna bed is a wonderful thing for root crops since it makes digging/pulling them much easier. Only challenge being where grown from small seeds, one needs a fine seedbed that can be kept moist till the seedlings are well up.

Technically, you can grow anything in a container, as long as the container is big enough. There are tables on the internet which give root depths for vegetables. If you are looking for smaller root systems for space efficiency, here is a list of vegetables for container gardening: You can grow many cultivars of vegetables in containers and they don't have to be miniature because they have shallow root systems... Vegetables for Container Gardening: Beans: Bush Romano, Bush Blue Lake, Tender Crop, Royal Burgundy, Henderson Bush, Jackson, Wonder Bush, Topcrop, Greencrop, Contender, (Pole) Blue Lake, Kentucky Wonder, Bush Romano, Bush Blue Lake, Tender Crop, Lima: Henderson Bush, Jackson, Wonder Bush Beets: Little Egypt, Early Red Ball, Asgrow Wonder,ÔDetroit Dark Red,Õ ÔGreentop Bunching,Õ ÔMonoking Burgundy, Red Ace, Little Egypt, Early Red Ball, Early Wonder, Detroit Dark Red, Boltardy, Burpee Golden Broccoli: Green Comet, DeCicco, Green Comet, DeCicco, Spartan, Italian Green Sprouting Brussels Sprouts: Jade Cross, Long Island Improved Cabbage: Dwarf Morden, Red Ace, Early Jersey Wakefield, Dwarf Modern, Red Ace, Early Jersey Wakefield, Little Leaguer, Earliana, Copenhagen Market, Ruby Ball Hybrid, Red Head Hybrid Carrot: Short & Sweet, Danvers Half Long, Tiny Sweet, Royal Chantenay,Õ ÔRed Cored Chantenay,Õ ÔLong Type Chantenay,Õ ÔDanvers 126Õ and ÔOrlando Gold, Baby Finger Nantes, Goldenhart, Little Finger, Royal or Red Cored Chantenay, Ox Hart, Baby Finger Chinese Cabbage: Michihili, Burpee Hybrid, Michihili, Burpee Hybrid Cucumbers: Burpless, Liberty, Early Pik, Crispy, Salty, Patio Pik, Spacemaster, Pot Luck, Bush Whopper, Bush Champion, Burpee Hybrid, Salad Bush, Parks Burpless Bush, Burpless Early Pik, Patio Pik, Spacemaster, Pot Luck Edible Flowers Garlic Most Varieties Green Onions: Beltsville Bunching, Crysal Wax, Evergreen Bunching Herbs Lettuce: Buttercrunch, Salad Bowl, Romaine, Dark Green Boston, Ruby, Bibb, Green Ice, Red Sails, Lolla Rosa, Buttercrunch, Nevada, Bibb, Parris Island Cos, Salad Bowl, Slobolt, Tendercrisp, Black-Seeded Simpson and Oakleaf, mustard cress, Salad Bowl, Ruby, Grand Rapids, Oak Leaf, Buttercrunch, Dark Green Boston, Little Gem, Bibb Onions: White Sweet Spanish, Yellow Sweet Spanish Parsley: Evergreen, Moss Curled Peas Radishes: Champion,Õ ÔRed Prince,Õ ÔScarlet Globe, Cherriette, White Icicle,Õ ÔChinese Winter, April Cross, ÔEaster Egg, Red Flame, Cherry Belle, Icicle, Cherry Belle, Icicle, Champion, Scarlet Globe, Cherry Belle, Scarlet Globe, (White) Icicle Spinach: Dark Green Bloomsdale Peppers: Yolo Wonder, Keystone Resistant Giant, Canape, (Hot) Red Cherry, Jalapeno Eggplant: Florida Market, Black Beauty, Long Tom, Slim Jim, Ichiban, Slim Jim, Ichiban, Black Beauty, Modern Midget, Mission Bell, Small Ruffled Red, Thai Green, Bambino, Sweet Banana, Yolo Wonder, Long Red Cayenne, Sweet Banana, Valencia (Hybrid), Jackpot (Hybrid), Camelot, Jalapeno, Red Chili, Giant Thai, Super Cayenne II, Sweet Banana, Yolo Wonder, Long Red Cayenne, Bell Boy, Keystone Resistant, California Wonder, New Ace, Red Cherry, Long Red Cayenne, Jalapeno, Thai Hot Squash: Dixie, Gold Neck, Early Prolific Straightneck, (Green) Zucco, Diplomat, Senator, Scallopini, Baby Crookneck, Creamy, Golden Nugget, Gold Rush, Zucchini (most varieties) Tomatoes: Tiny Tim, Small Fry, Sweet 100 Patio, Burpee's Pixie, Toy Boy, Early Girl, Better Boy VFN, Agriset 761, Better Boy, Celebrity, Colonia, Mountain Fresh, Mountain Gold, Mountain Spring, ParkÕs Improved Whopper, Sunbeam, Solar Set, Sanibel, Captiva, Sunleaper, Suncrest, Sunrise, Sunpride, Terrific, Cherry Grande, Mountain Belle, Small Fry, Sweet 100, Peto Hybrid 882, Plum Dandy, Tropic, Caruso, Laura, Jumbo, Tropic, Vendor, Tiny Tim, Small Fry, Sweet 100, Patio, Burpee's Pixie, Toy Boy, Early Girl, Better Boy VFN, Pixie, Red Robin, Sugar Lump, Tumblin' Tom (hanging baskets), Patio, Pixie, Tiny Tim, Saladette, Toy Boy, Spring Giant, Tumbling Tom, Small Fry