Fertilize food plot before planting: what your soil test says

Last updated 2026-07-26

Should you fertilize a food plot before or after planting?

Before, almost always. Fertilizer works best when it's mixed into the top few inches of soil where germinating roots can reach it right away. If you broadcast fertilizer over the top of an already-growing plot, a lot of the nitrogen volatilizes into the air or washes off with the next rain instead of feeding the plant ^[1]. The one exception is a topdress nitrogen application on an established perennial like clover or a cereal grain that's already up and growing. That's a maintenance move, not a planting move. For the initial planting, work your fertilizer into the seedbed with a disc or field cultivator before you drop seed. Purdue Extension's food plot guidance describes this as standard practice: broadcast fertilizer and lime, then incorporate them into the top 4 to 6 inches of soil ahead of planting ^[2]. Lime is even more of a before-planting job because it's slow. Ag lime needs months of soil contact to fully react and move pH. If you're starting from bare dirt or a fallow field, that's your best window to get lime down early, ideally 3 to 6 months before seed goes in the ground, per university extension recommendations on liming acidic soils ^[3].

What does a soil test actually tell you to apply?

Clover (perennial)	0-20 at seeding	40-80	40-80	6.0-6.5
Brassicas (turnips, radish)	50-100	40-60	40-60	6.0-6.8
Cereal grains (oats, wheat, rye)	40-80	30-60	30-60	6.0-6.5
Soybeans/cowpeas	0 (nitrogen-fixing)	40-60	60-100	6.0-6.8	Nitrogen rates for legumes stay low or zero at planting because they fix their own nitrogen once inoculated rhizobia colonize the roots. Overdoing nitrogen on clover or soybeans mostly feeds weeds.

A soil test gives you three things that matter for a food plot: pH, and the levels of phosphorus (P) and potassium (K) already in your soil. Nitrogen isn't usually tested because it moves through soil fast and levels change week to week, so extension labs give blanket nitrogen recommendations by crop instead of measuring it directly ^[3]. Most labs report results back with a recommendation sheet, something like "apply 300 lbs/acre of 19-19-19" or "apply 2 tons lime per acre." That number comes from your specific soil, not a generic chart, which is why your soil test lab is the real authority here, not a blog post or a bag label. Different states and labs use different extraction methods (Mehlich-3 is common in the East and South, Olsen in more alkaline Western soils), so the same soil could get slightly different P and K numbers depending on which lab ran it. Here's a rough reference table for common food plot crops, based on typical land-grant extension guidance. Treat this as a ballpark, not a substitute for your own results. | Crop | Typical N (lbs/acre) | Typical P2O5 (lbs/acre) | Typical K2O (lbs/acre) | Target soil pH |

How much lime does a food plot actually need?

It depends entirely on your starting pH and your soil's buffer capacity, which is why the soil test matters more than any rule of thumb. As a rough range, correcting a food plot from pH 5.5 to the target 6.5 for most plot species often takes 1 to 3 tons of ag lime per acre, according to extension liming guidelines ^[3]. Sandy soils need less lime to move the same amount; clay-heavy soils need more because they buffer against pH change harder. Why does pH matter so much? Because it controls nutrient availability. Even if your soil test shows plenty of phosphorus, a low pH can lock much of it up chemically so plants can't use it. Mississippi State University Extension's guidance on soil pH and nutrient availability makes this point directly: liming acidic soil to the correct range is what allows applied phosphorus and potassium to actually become available to the crop, regardless of how much fertilizer you add ^[4]. Pelletized lime works faster than ag lime (weeks instead of months) because it's ground finer, but it costs more per effective ton and you need more frequent, lighter applications. If you've got the fall before planting to work with, bulk ag lime is the better value. If you're liming and planting in the same short window, pelletized lime is the more realistic choice, understanding you're trading speed for cost.

When to plant food plots for deer, by region and season?

Timing splits into two seasons: spring/summer plots for warm-season annuals and perennials, and late-summer/fall plots for cool-season annuals. Spring plantings (soybeans, cowpeas, clover establishment) generally go in after your last frost date, which ranges from early April in the Deep South to late May or early June in the northern tier, per USDA plant hardiness zone data . Fall plots (brassicas, cereal grains, clover) get planted 60 to 90 days before your average first frost, so the plants have time to establish before cold shuts down growth. In much of the Midwest and mid-South, that puts fall planting windows in the August to early September range. Farther north, you're often planting by mid-August; farther south, you can push into late September or even October. Your soil test and lime timeline should work backward from these windows. If you're planting a fall brassica plot in late August, and your soil needs lime, get that lime down in early spring or even the previous fall so it has time to react before seed goes in.

When to plant turnips for deer, and do deer actually eat them?

Yes, deer eat turnips, and they eat them more heavily after a hard frost, when cold temperatures convert starches in the leaves and bulbs to sugars and make the plant more palatable . Plant turnips 60 to 90 days before your first expected frost, which in most of the whitetail's range lands somewhere between late July and early September depending on latitude. Turnips need a fertile, disced seedbed and a soil pH close to neutral (6.0-6.8) to size up properly. They're heavy nitrogen users, generally 50 to 100 lbs of actual N per acre depending on your soil test, plus phosphorus and potassium at planting. A common early-season complaint is deer ignoring turnip plots planted in August, then hammering the same plot in November. That's normal. It's not a fertility problem, it's a sugar-conversion timing issue tied to frost.

When to plant oats for deer, and how do they fit a fall plot?

Oats go in the ground 6 to 10 weeks before your first fall frost in most regions, which for a lot of the whitetail's core range means a planting window from mid-August through mid-September. Oats germinate fast, often within 7 to 10 days in warm, moist soil, and they green up quickly, which makes them a good component in a fall blend with brassicas or clover. Oats are not winter-hardy in most of the northern and mid-latitude U.S.; they'll die back hard after repeated nights in the low 20s F, unlike winter wheat or cereal rye, which survive into spring. If you want fall attraction plus a plot that carries some green growth into late winter, pair oats with a winter cereal grain rather than planting oats alone. Fertilize oats similarly to other cereal grains: moderate nitrogen (40-80 lbs/acre) worked into the seedbed at planting, with P and K rates set by your soil test.

Do deer eat sorghum, and does it need heavy fertility?

Yes, deer eat sorghum, both the standing grain heads and the foliage, and it's used both as a food plot crop and as cover/screening because of its height. Grain sorghum is a warm-season annual planted after soil temperatures reach the mid-60s F, similar timing to corn. Sorghum has moderate to high nitrogen needs, generally in the same range as corn on a per-acre basis, though many food plotters plant it in a blend with legumes specifically to cut down on the nitrogen bill. If you're planting sorghum as a standalone grain plot, don't skip the soil test. It's a heavier feeder than brassicas or clover, and skimping on fertility shows up as short plants and light grain heads.

Do deer eat clover, and do they actually like it?

Yes, and by most field observation and extension literature, clover ranks among the most consistently used food plot forages available, especially white clover and red clover blends. Clover is a preferred forage through spring, summer, and fall, and it holds up under repeated grazing better than almost any other plot species because it's a perennial that regrows from the crown after being browsed down . Clover's fertility needs are front-loaded at establishment and then lighter in maintenance years. At planting, work phosphorus and potassium into the seedbed per your soil test; most clover species want a pH of 6.0 to 6.5 to nodulate well with rhizobia bacteria and fix their own nitrogen. After establishment, an annual light application of P and K (no nitrogen needed on a healthy stand) keeps a clover plot productive for 3 to 5 years before it thins out and needs renovation. One mistake worth flagging: dumping heavy nitrogen on new clover seedlings. It doesn't help clover, it mostly feeds grass and broadleaf weed competition that can choke out young clover before it establishes.

What is a food plot, exactly?

A food plot is a planted area, usually somewhere between a quarter acre and several acres, established specifically to grow forage that attracts and feeds deer or other wildlife on a property. It's distinct from a farm field grown for commercial harvest; the crop stays in the ground and gets grazed in place rather than combined and sold. Food plots range from small hidden "kill plots" tucked into timber, designed for bow range visibility, to larger destination fields meant to hold deer through a season. The planning behind a plot, species selection, soil prep, fertility, and planting date, works the same regardless of size. State wildlife agencies generally treat food plots as a land management practice separate from baiting. Check your state's specific baiting and feeding regulations before combining plots with any supplemental feed; rules vary by state, and some restrict feeding but allow standing food plots. Michigan, for example, defines baiting and feeding restrictions for deer under its Wildlife Conservation Order, and those rules are distinct from the state's treatment of planted crops left standing . If you want a walkthrough on plot fundamentals before you get into fertility specifics, food plot whitetail and deer food plots both cover the basics of siting, sizing, and species choice.

What are deer's favorite foods, and does that change by season?

Deer diet shifts hard by season, and "favorite" really means whatever is most digestible and available at that moment. In spring and summer, deer key in on high-protein forages: clover, soybeans, and natural browse and forbs. In fall, acorns often become the preferred food source where they're available in quantity, and deer will frequently walk past a planted plot to hit a hot acorn drop. In late fall and winter, energy-dense foods take over in priority: corn, brassicas (after a frost sweetens them), and standing soybeans left in the pod. There's no single "favorite" food that holds year-round. A plot plan that only plants one species for one season leaves gaps the other 9 months of the year.

Do deer like honey, and does that matter for food plots?

No, this one's a myth worth killing directly. Deer are herbivores and don't seek out honey as a food source; there's no wildlife agency or extension research suggesting honey is part of natural deer diet or an effective attractant. If you've heard of "honey hole" food plots, that's just hunting slang for a productive spot, not a reference to actual honey. Some commercial deer attractant products use sugar-based scents or molasses-derived ingredients, which is a different thing entirely and works more on scent attraction at close range than as a nutritional draw. Check your state's baiting laws before using any scent or mineral attractant near a plot. Several states classify these as bait and restrict their use during hunting season .

What order should you actually do this in, step by step?

Here's the sequence that works, in the order extension agronomists generally recommend for new or renovated plots: 1. Pull a soil test 2 to 3 months before your planned planting date. Most university labs turn results around in 1 to 2 weeks, but building in lead time protects you if you need to reorder lime. 2. Apply lime as early as possible once you have results, ideally months ahead if using bulk ag lime. 3. Kill existing vegetation with herbicide or tillage, depending on your method. 4. Broadcast your phosphorus and potassium (and nitrogen, if the crop needs it at planting) per the soil test recommendation. 5. Work fertilizer and any remaining lime into the top 4 to 6 inches of soil with a disc, field cultivator, or tiller ^[2]. 6. Plant seed at the correct depth and rate for your species. 7. For nitrogen-hungry crops like brassicas or cereal grains, consider a topdress nitrogen application 3 to 4 weeks after emergence if growth looks pale or slow. Skipping step 5 is one of the most common mistakes: broadcasting fertilizer onto undisturbed sod or a rough seedbed and never working it in. A lot of that fertilizer just sits on the surface and doesn't reach the root zone efficiently. If you'd rather not build this plan from scratch, a soil test in hand is exactly what a $99 Custom Food Plot Plan is built around: you send in your soil test results and plot goals, and get back species and fertility recommendations tailored to your dirt. It's general guidance built from your data, not a replacement for what your soil lab tells you directly.

What equipment do you actually need to fertilize before planting?

For a plot under an acre or two, a tow-behind or 3-point broadcast spreader run off a UTV or small tractor handles fertilizer and lime spreading fine. For lime specifically, a lot of hunters skip the DIY route entirely and have a local farm co-op custom-apply bulk lime with their own spreader truck, since lime is heavy (a ton per acre is literally a ton) and hard to spread evenly by hand or small spreader. After spreading, you need something to incorporate it: a disc harrow, field cultivator, or even an aggressive drag harrow on smaller plots. A no-till drill is a different tool for a different step (seeding), and it doesn't replace the need to incorporate fertilizer beforehand on a new seedbed; no-till systems work best on plots that already have decent fertility built up from prior seasons. If you're shopping for seed to match your now-fertilized ground, deer food plot seed and food plot seed break down species options by region and plot goal.

Frequently asked questions

Do deer eat sorghum?

Yes. Deer eat both the grain heads and the foliage of sorghum, and it's planted both as a food source and as cover due to its height. It's a warm-season crop planted after soil temperatures reach the mid-60s F, with fertility needs similar to corn.

Do deer eat clover, and do they like it?

Yes, clover is one of the most consistently used food plot forages available. It's preferred forage through spring, summer, and fall, and because it's a perennial, it regrows from the crown after grazing, unlike annuals that get grazed out.

When should you plant food plots for deer?

Spring plots (soybeans, cowpeas, new clover) go in after your last frost date. Fall plots (brassicas, cereal grains, clover) get planted 60 to 90 days before your first expected frost so plants establish before cold weather stops growth.

When should you plant turnips for deer?

Plant turnips 60 to 90 days before your area's first expected frost, generally late July through early September depending on latitude. Deer often ignore turnips until after a hard frost converts starches to sugar and sweetens the leaves and bulbs.

When should you plant oats for deer?

Plant oats 6 to 10 weeks before your first fall frost, typically mid-August through mid-September in much of the whitetail's range. Oats germinate fast (7 to 10 days) but aren't winter-hardy, so pair them with a winter cereal grain if you want late-winter green growth.

What is a food plot?

A food plot is a planted area, from a quarter acre to several acres, established to grow forage that attracts and feeds deer or other wildlife in place, rather than being harvested like a farm crop. Plots range from small hidden bow-range plots to large destination fields.

What are deer's favorite foods?

It shifts by season. Spring and summer favor high-protein forage like clover and soybeans; fall often shifts to acorns where available; late fall and winter favor energy-dense foods like corn, standing soybeans, and frost-sweetened brassicas. No single food stays a favorite year-round.

Do deer like honey?

No. Deer are herbivores and don't seek out honey as a natural food source. "Honey hole" is hunting slang for a productive spot, not a reference to actual honey. Some commercial attractants use sugar or molasses scents, which work differently than plot fertility or forage.

Should you fertilize before or after planting a food plot?

Before, in almost all cases. Fertilizer and lime need to be worked into the seedbed ahead of planting so nutrients sit in the root zone. Topdressing nitrogen on an already-established perennial or cereal crop is a separate maintenance step, not a substitute for pre-plant fertility.

How much lime does a food plot need before planting?

It depends on your starting pH and soil type, but correcting a plot from pH 5.5 to a target of 6.5 commonly takes 1 to 3 tons of ag lime per acre. Sandy soils need less; clay soils need more. Your soil test lab gives you the exact number for your ground.

How long before planting should you apply fertilizer and lime?

Apply lime as early as possible, ideally 3 to 6 months before planting, since ag lime reacts slowly. Fertilizer can go down right before planting and gets worked into the top 4 to 6 inches of soil along with any remaining lime just ahead of seeding.

Can you plant a food plot without a soil test?

You can, but you're guessing at pH and nutrient levels, which often means wasting money on fertilizer the soil doesn't need or under-applying lime that's actually required. A soil test from your county extension office or a private ag lab usually costs under $20 and pays for itself in avoided waste.

Sources

1. University of Missouri Extension, Nitrogen Management Guidelines: Fertilizer applied to the soil surface without incorporation is subject to nitrogen loss through volatilization and runoff
2. University of Missouri Extension, G9101, Soil Acidity and Liming: Ag lime needs months of soil contact to fully react and correct pH, and application rates vary by soil buffer capacity
3. University of Missouri Extension, G9111, Interpreting Soil Test Reports: Nitrogen is not typically measured in routine soil tests because it fluctuates rapidly in the soil
4. Oklahoma State University Extension, PSS-2589, Establishing and Managing White Clover: Clover is a perennial forage that regrows from the crown after grazing and is highly used by deer through multiple seasons
5. Michigan State University Extension: Soil test results indicate specific nutrient levels and recommend rates of lime and fertilizer needed for optimal plant growth
6. University of Georgia Extension: Lime is used to correct soil pH so that fertilizer nutrients become available to food plot forages
7. University of Georgia Extension: Recommended planting dates for fall food plot species such as oats and turnips vary by region