Sugar, black, red, silver and Norway maple, box elder, birch and black walnut can all be tapped. A chart of sap sugar, gallons of sap per gallon of syrup by the Rule of 86, season compared with sugar maple, and flavor, plus a sap Brix chart for your refractometer reading.

Sheet mulching turns grass into a no-dig bed with cardboard and layers of greens and browns. Enter your bed size to get the cardboard, cubic feet, bags and cubic yards for every layer.

Raising soil pH from 5.5 to 6.5 takes about 7.8 pounds of finely ground limestone per 100 square feet in loam, less in sandy soil and more in clay. Enter your pH, soil texture and bed size for pounds of lime, split into applications that stay under extension per-application caps.

Carrots, parsnips, leeks, kale, spinach, garlic and onions can stay in the bed over winter. A chart of how cold each one takes, when you harvest it, and whether it needs mulch, row cover or a cold frame.

Most vegetables grow best at a soil pH of 6.0 to 7.0, and 6.5 is the target for a mixed bed. A soil pH chart for 50+ crops and herbs from extension guides, with how to test your soil and raise a low pH with lime or wood ash.