Reader support helps keep the reviews honest and the site humming. As an Amazon Associate, I earn from qualifying purchases.6 Best Fertilizer For Hedges | Feed, Don’t Fight Your Soil

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The granular powerhouse that turned yellow boxwoods green in two days.

If you need fast, dramatic results on struggling shrubs, this is the granular feed to grab. The 21-6-8 ratio (21% Nitrogen, 6% Phosphorus, 8% Potassium) is high in nitrogen to push out dense green leaves, and it uses five different nitrogen sources that release at different speeds so the feed lasts for weeks. Buyers report that “within two weeks, anemic, yellow, dying plants turned into thriving, bright green, shiny shrubbery.” It comes in a 64-ounce bag (4 pounds) and covers both in-ground and container plants.

Unlike the milder Espoma organic option below, the Nelson formula hits hard with 21% nitrogen — so you see results fast, though the bag is smaller at 4 lb versus Espoma’s 18 lb. You will need to reapply every 30 days during the growing season for continuous feeding.

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An 18-pound organic feed that makes evergreens bright green in just weeks.

This is the set-and-trust organic option for anyone who wants natural ingredients without mixing. The 4-3-4 ratio (4% Nitrogen, 3% Phosphorus, 4% Potassium) is gentle but effective — one reviewer noted “it made my evergreens bright green just after a couple of weeks!” The 18-pound bag covers a lot of ground, and it is approved for organic gardening. It contains a proprietary Bio-tone formula (a blend of beneficial microbes that supports root development), plus 5% sulfur for acid-loving evergreens like pines and azaleas.

The Espoma is a milder feed compared to the Nelson granular above — 4-3-4 versus 21-6-8 — so results are slower, but the huge 18 lb bag and organic certification make it a better fit for larger hedges and users who avoid synthetic chemicals. One buyer mentioned the smell is a bit “barnyard” due to chicken manure, but the plants love it.

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Hammer them in once in spring and the shrubs are fed all season long.

These spikes are the ultimate low-effort solution for busy homeowners. The 16-4-4 ratio (16% Nitrogen, 4% Phosphorus, 4% Potassium) is high in nitrogen to push leafy growth, and the spikes release slowly underground so there is no runoff, no mixing, and no measuring. Owners mention that you can literally “low-maintenance…..actually pound them into the ground and they will work for the year.” The 30-count box provides enough spikes for several shrubs or a few young trees.

Compared to the liquid Arbowitae fertilizer below, the Jobe’s spikes deliver a much higher nitrogen ratio (16-4-4 vs an unlisted ratio) and last longer — a single application feeds for the whole growing season rather than needing biweekly mixing. They do require damp soil and a mallet to install in hard ground, but the convenience is class-leading.

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A 32 oz liquid that soaks into sandy soil where spikes cannot keep up.

For sandy or fast-draining soil, liquid fertilizer is often the only way to get nutrients down to the roots quickly. This 32-ounce concentrate from TPS Nutrients mixes at a rate of 2 tablespoons per gallon and is formulated specifically for arborvitae and other evergreens. One buyer in sandy soil noted it “outperformed fertilizer spikes” and that “biweekly feeding revived dying branches, boosted growth.” It also survived a Chicago winter where nearby unfertilized trees died, per the same reviewer.

At 32 ounces, the TPS liquid is a smaller unit count than the Nelson granules (64 ounces), meaning you get less volume for the money and need to reapply more often. But for trees that are actively dying or in very poor soil, the liquid form delivers immediate relief that a spike cannot match — fast absorption with no waiting for breakdown.

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Tough 5-inch spikes that stay intact even when hammered into hard clay.

Clay soil is dense and can crush weaker fertilizer spikes before they even go in. The Old Farmer’s Almanac spikes are built to handle it — customers note they “stay intact even when I use a mallet to bang them into clay soil.” The 13-3-3 ratio (13% Nitrogen, 3% Phosphorus, 3% Potassium) provides a solid 13% nitrogen for leaf growth, with natural ingredients like molasses that feed the root zone directly. The pack contains 24 spikes weighing 6 pounds total, and each spike is 5 inches long for deep placement.

These spikes have a slightly lower nitrogen percentage (13-3-3) than the Jobe’s option above (16-4-4), but they include natural ingredients and a tougher build that survives rocky or compacted ground. One owner reported they cracked during hammering, so pre-drilling a pilot hole is recommended for very hard soil.

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Spikes engineered for sandy soil that loses nitrogen every time it rains.

If your yard is mostly sand, nitrogen leaches out fast. This SimplyGro spike uses a 12-3-3 formula (12% Nitrogen, 3% Phosphorus, 3% Potassium) that time-releases for up to 3 months per application, so the feed stays in the root zone even after heavy watering. One buyer in sandy soil confirms “these time-release nitrogen spikes keep soil fertile for months” and turned sparse, dying fruit trees into lush, thriving plants. The pack holds 24 spikes at 6.0 pounds, and each 5-inch spike is a patented TruSpike design that should not break or crumble.

Compared to the TPS liquid (which also works in sandy soil), the SimplyGro spikes require far less effort — apply twice a year (spring and fall) instead of biweekly mixing. The nitrogen is lower at 12% versus the Nelson granular’s 21%, but the long release period makes up for the slower delivery.