Best Fertilizer Spikes of 2026

Arborvitae, spruce, and pine that have gone flat and yellowish are what this box is for, and it's the one we reach for when an evergreen is the patient. The 13-3-4 analysis leans on nitrogen, the nutrient behind needle color and new growth, and the label names the plants it was built around: cypress, arborvitae, pine, cedar.

Fifteen pre-measured spikes, twice a year, early spring and late fall, is the same routine as the rest of Jobe's line, which is a large part of why we keep recommending it to people who don't want a fertilizer hobby. On a young screen of arborvitae, one box goes a fair distance; a long established hedge will want a second.

Worth being straight about how different this is from a general tree spike. 13-3-4 isn't far from the 16-4-4 in the box above, and a mixed yard does fine on one all-round formula. The evergreen version earns its place on a property that is mostly conifers, or on an acid-loving planting that has never been fed. Expect deeper color more than a growth spurt: this is a feed that shows up across a season.

Compared with the Jobe's and Miracle-Gro spikes above, these are noticeably denser: a five-inch TruSpike that goes into the ground without a plastic cap over the top, and without a pilot hole in anything but the hardest soil. The shape is the whole pitch, a solid tapered peg rather than a crumbly pressed oval.

The 8-8-8 analysis is balanced rather than tailored, which makes it a reasonable one-box answer for a mixed row of trees and shrubs. The number that changes your calendar is the release: up to three months of continuous feed per spike. The twice-a-year products are on a spring-and-fall rhythm; these are closer to quarterly rounds if you want nutrition running all season.

Where these earn their place is ground that has beaten you before. If you've watched a cheaper spike shatter on contact, the extra money buys a peg that goes in whole, and that is a real convenience rather than a marginal one. Two things to weigh: the cost per spike is higher than the big tree-and-shrub brands, and in skunk country the spikes can get dug up, so set them just below the surface and firm the soil over them.

Six spikes in a 1.5-pound box is a small purchase, and that's the point. This is a box for one tree, or for someone who wants to see whether spikes suit them before committing to a case of seventy.

The 13-3-3 analysis is nitrogen-forward and aimed at trees, evergreens, and shrubs, the same territory as the Jobe's evergreen box in a much smaller commitment. Six spikes won't stretch to a hedge and aren't meant to; on a single specimen at the drip line, the box does a season's feeding.

Driving them is simple in soft ground, since the TruSpike shape takes a hammer better than the pressed ovals do, but dry ground splits them like any other spike, so water first. Behind the box is a 30-day Happy Plant Promise, a refund-or-replacement offer that is a better safety net than anything else in this guide carries, and a genuine reason to try a new brand on one tree rather than five.

We like it as a trial size and as a top-up box for a single specimen. Per spike it costs more than the big tree-and-shrub packs, and what you're paying for is a small quantity and a plant-specific ratio, so it makes sense for one tree and not for a yard.

Fruit trees are where spike shopping gets pricey, and this is the least costly way into it among the fruit formulas worth recommending. Twelve spikes with a 10-15-15 analysis, aimed at apple, orange, lemon, lime, avocado, and palm: a spread wide enough to cover a small home orchard plus the potted citrus on the patio.

We rate it as the budget route into fruit-tree feeding rather than a compromise. The high phosphorus and potassium numbers are the point, since those are the nutrients behind blossom and fruit rather than leafy growth, and the schedule, early spring and again in mid-fall, puts the feed in the ground before and after the fruiting season. Palms on the target list make it a reasonable single box for a mixed subtropical yard.

What keeps it out of the top spot is the way the spikes handle. The tops crack easily in firm ground, and starting each hole with a pick is the difference between a clean job and a pocketful of fragments. A high-phosphorus feed applied too generously can also drop leaves on a young tree, so measure by drip-line diameter rather than adding a spare spike for luck.

The spikes arrive stuck to each other. That's the first thing to know about this box, and it's a storage problem rather than a formula problem: the sticks pick up moisture in the pack and fuse into little bundles, so you'll spend a minute working them apart. A paring knife tip or a firm twist does it, and the ones that crumble are still usable pushed into the soil in pieces.

Get past that and this is the indoor feed we keep coming back to, mainly because of the arithmetic of a windowsill full of pots. Forty-eight spikes across two packs, a 6-12-6 analysis that suits foliage plants and flowering ones, and a two-month feed per spike means the pothos, the fern, the spider plant, and the croton all get fed from one box without anyone measuring liquid concentrate into a watering can. Ferns, spider plants, pothos, and croton are named on the label, and it's cleared for indoor potted plants when used as directed.

Two months is the number to plan around. This isn't a feed-it-and-forget-it-for-a-year product; it's a nudge every couple of months, which suits anyone who already walks the plants with a watering can. Follow the pot-size count on the label rather than guessing, and keep the box sealed and dry between rounds, which is what stops the next batch from arriving fused.

Seventy spikes in one case is a different kind of purchase from the little twelve-count boxes. This is the one for the person who has just planted a hedge line, a windbreak, or a dozen shrubs along a fence and doesn't want to run out halfway down the row, or drive back to the store for a second box.

The 15-10-9 analysis is an all-round ratio rather than a specialist one, which is exactly right for mixed plantings: evergreens on one side of the yard, flowering shrubs on the other, and no appetite for buying three different boxes. The case runs about 18 pounds, so plan on a shelf in the garage rather than a corner of the potting bench.

Driving them is where the case earns or loses its keep. A bulb auger or a long screwdriver makes short work of the job, and the difference between a clean insertion and a handful of crumbs is usually the hole you made first. In ground that's been watered they go in with a few taps; in July clay, bore first.

Per spike, this is the best value in this guide by a wide margin, and nothing else here comes close for a big property. What you give up is specificity: no fruit formula, no evergreen formula, just a solid all-round feed and a heavy case to store. For a new landscape with a lot of young plants going in at once, that's a trade worth making.

Clay is where most citrus spikes fail, and not in the formula — at the point of installation. These are the dense TruSpike pegs in a twelve-count box, five inches long and rated for up to three months of feed, and they're in this guide because they go into firm ground whole where softer spikes come apart.

The 8-4-8 analysis is unusual in having more potassium than phosphorus, and it's aimed at citrus, fruit, berry, and nut trees rather than at shade trees. Twelve spikes covers a small collection of young or potted trees, and the labeled count per trunk is the thing to follow, since more is not better with a feed this concentrated.

The trade-off is straightforward. You pay the highest per-spike price in this guide for a formula aimed at one group of plants, and what you get back is a spike that survives the trip into the ground. If your citrus lives in a pot of soft potting mix on a patio, the cheaper Miracle-Gro box does the same job; if it's in the ground in heavy soil, this is the one that gets there in one piece.