15 Garden Plants You Should Never Fertilize in August

Fertilizing on the finish of summer time is suitable in some circumstances, however not all. It’s good to feed your fall greens, and feeding your late-season annuals is a good suggestion. Nonetheless, for a lot of backyard crops, it’s best to by no means fertilize in August or past.

Crops that it’s best to fertilize this time of 12 months embody your fall greens, after all. In August, these crops are simply getting began and can want loads of vitamins to achieve their full, scrumptious potential. Late-season annuals also can take a lightweight utility of a bloom-boosting system. 

Your container crops are nonetheless positive for feeding; most of these will are available in for the winter. Late-blooming perennials also can deal with a little bit of bloom booster. We would like these to flower robustly, however go simple on nitrogen. That may make them put out susceptible new progress and make them extra prone to frost harm. 

That susceptible new progress is exactly the explanation why we by no means fertilize sure crops in August or past. For a lot of of your backyard crops, it’s time to start their transition into dormancy and relaxation. Bushes and shrubs, on the whole, require no further vitamins at the moment. You must also skip perennials not blooming. Listed below are some specifics to keep away from within the month of August, and past. 

Lilac

Lilacs are first on my record of crops it’s best to by no means fertilize in August. The rationale for that is twofold. For one factor, these bloom within the spring, so this time of 12 months, they’re winding down. Fertilizing now will trigger the shrub to provide new progress, which is extra susceptible to chilly harm. 

Lilacs additionally bloom on previous wooden. That implies that by late summer time, they’re already forming buds that would be the subsequent spring’s flowers. Feeding them now can intrude with bud improvement. It may possibly encourage inexperienced progress, which is able to lead to fewer flowers altogether. 

It’s greatest to attend till spring to feed your lilacs. You may give them an utility of compost or manure, which is able to break down slowly. These vitamins will likely be a lot to maintain the roots completely satisfied by means of the winter, and be able to do their job within the spring. 

Bigleaf Hydrangea

The rationale it’s best to by no means fertilize bigleaf hydrangeas in August is much like these for lilacs. These shrubs produce flowers on progress from the earlier season, so they’re setting them in late summer time. Fertilizer, and particularly nitrogen, can encourage leaf progress and stifle the formation of buds. 

That new progress will likely be tender and extra prone to frost harm or winter dieback. New, gentle stems could not harden off in time, which can lead to tip dieback and a drastic discount in flowers, if any. You need your bigleaf hydrangeas to calm down for winter and regularly enter dormancy. 

By no means fertilize these in August, and somewhat wait till early spring. The perfect time to start is as quickly as you see new leaf progress. You may give them a second utility of a slow-release system in late spring to early summer time. For now, deadhead the spent blooms and depart every little thing else to nature. You possibly can mulch to guard the roots. 

Rose

Roses are one other flowering shrub that it’s best to by no means fertilize in August, at the very least, not in delicate or cooler climates. By doing so, you possibly can disrupt the rose’s dormancy cycle by inducing new progress. The frost will harm and even kill that tender new progress, weakening the plant altogether. 

Fertilizing now also can result in fewer blooms within the spring. It shifts the plant’s vitality towards foliage and root improvement. Your rose must retailer this vitality for spring, when it’s going to begin producing these buds. 

For now, put together your rose for dormancy by deadheading. This could encourage a remaining flush of flowers in repeat bloomers. Maintain your rose watered and apply mulch to guard the roots. In any other case, let nature take its course.

The exception to that is in heat climates, the place a lightweight utility gained’t do any hurt. However this needs to be the final utility of the 12 months.

Apple

You need to by no means fertilize an apple tree, or most fruit bushes as a complete, in August. For one factor, you’ll get that flush of latest progress, which generally is a catastrophe for fruit bushes. Their tender progress is extremely prone to frost harm, which is able to damage their productiveness subsequent season. 

Feeding your apple tree now shifts vitality from bud formation to foliage and root progress, and we don’t need that proper now. It additionally disrupts the tree’s dormancy cycle, conserving it in progress mode, somewhat than slowing down and storing vitality for the spring. 

Fertilize your fruit bushes in early spring, simply because the leaf buds start to interrupt. A second utility in early summer time is suitable if the brand new progress appears weak. For now, harvest any fruit left on the tree and mulch to suppress weeds. Depart some house across the trunk to stop rotting.

Pear

The explanations it’s best to by no means fertilize pear bushes in August are the identical as these for apple bushes. It encourages tender new progress that will likely be extra prone to frost harm, which may trigger dieback. It additionally makes the tree extra susceptible to pests and ailments. 

Pear bushes additionally start forming buds about this time of 12 months. Late fertilization shifts the vitality away from this and into new progress. You’ll have fewer blossoms and fewer fruits within the subsequent season. Maintain off till early spring, and for now, maintain it watered and add some mulch to guard the roots. 

Peach

Peach bushes, like different fruits, don’t want an end-of-summer fertilizer utility. Feeding your peach tree now, particularly in zones 6-8, is sure to go away you with chilly harm and doubtlessly, dieback. You don’t need weak branches going into winter. 

By no means fertilize your peach bushes in August, because it disrupts their pure dormancy cycle. These type subsequent 12 months’s flower buds in late summer time, so you’ll scale back the quantity and high quality of blooms by fertilizing now. As an alternative, wait till early spring, simply earlier than bud break, to feed your peaches and different fruits. 

Plum

One other fruit tree that it’s best to by no means fertilize in August is the plum tree. Excessive nitrogen fertilizers are a very dangerous thought. The brand new progress that nitrogen produces is susceptible to chilly harm. Frost harm can result in dieback, and it additionally makes the tree extra prone to ailments. 

Fertilizing fruit bushes in August can result in long-term structural harm. It disrupts your plum tree’s dormancy cycle and interferes with bud formation. Maintain off on feeding till early spring, and as an alternative, mulch and monitor for pests and ailments. 

Tulip

You need to by no means fertilize tulips or different spring-blooming bulbs in August. Tulips are dormant in August; they’re in full dormancy with no foliage to feed. Fertilizing now’s a waste of sources, because the bulbs can’t and won’t take in the vitamins. In truth, it will possibly improve the chance of rot or entice soil pathogens.

In some circumstances, if the bulb will not be fully dormant, fertilizing could cause untimely progress. You’ll have tulips sprouting within the fall and dying again within the winter. Then you definately danger no flowers or weak flowers within the spring. The instances to fertilize tulips are in late fall, whenever you plant them, with a slow-release system, and in early spring.

Daffodil

Daffodils, like tulips, are one other bulb it’s best to by no means fertilize in August. Feeding them now could cause bulb rot or fungal progress, particularly in case your soil doesn’t have glorious drainage. Nitrogen, particularly, promotes gentle tissue and microbial exercise. 

Fertilizer performs a major function in flower efficiency in your daffodils. One of the best instances to fertilize are within the fall, whenever you plant them. Work in a slow-release system, ideally one that’s low in nitrogen. Then feed them once more within the spring, as quickly because the leaves start to emerge. 

Hyacinth

By no means fertilize your hyacinths in August. They are going to be fully dormant by this level within the 12 months. Dormant bulbs can’t take in vitamins, so it’s a waste of sources and may result in bulb rot or harm.

In heat climates, it will possibly additionally trigger the bulbs to interrupt dormancy early, which ends up in weak and mis-timed progress. 

Coneflower

Coneflowers are tender perennials, they usually’re environment friendly with vitamins on the whole. They usually carry out fairly properly with no fertilizer in any respect. Nonetheless, when you should, feed them when new progress seems, which is normally late spring. 

By August, coneflowers gradual their progress in preparation for dormancy. Feeding them now, particularly with nitrogen, could cause a flush of progress. That late progress is extra prone to frost harm, which weakens the plant. Weakening the plant simply earlier than winter is a recipe for dieback. By no means fertilize conflowers in August.

Yarrow

Yarrow begins to decelerate as summer time involves an in depth, so it’s best to by no means fertilize them in August. Fertilizing now will trigger a flush of soppy, new progress. That is unlikely to harden off earlier than fall, which makes it susceptible to die again. 

Fertilizing your yarrow in August will scale back its drought and chilly tolerance. It results in weaker crops going into winter and poor progress within the spring. Yarrow actually doesn’t want fertilizer in any respect. It results in floppy stems, overgrown foliage, and fewer flowers.

Liatris

You need to by no means fertilize your liatris in August. By this time of 12 months, they’re slowing down and getting ready for dormancy. New progress at this level within the 12 months is not going to harden off and may weaken the plant over the winter. 

Liatris grows from corms, and that’s the place it shops its vitality for the following 12 months. In case you fertilize in late summer time, the plant doesn’t know to preserve vitality by drawing it again into the corm. This ends in weaker corms and fewer flowers within the coming 12 months. This plant hardly ever wants fertilizer in any respect. A lightweight utility of compost is normally a lot. 

Milkweed

Milkweed is one other perennial that it’s best to by no means fertilize in August, particularly when you’re rising it to feed monarch butterflies. Milkweed begins the transition to dormancy in late summer time. Fertilizing now will delay that course of and intrude with root vitality storage. 

Milkweed prefers poor soil, and too many vitamins will scale back its flowers. Together with these flowers, the pollinator worth additionally decreases. Overfertilizing milkweed at any time will result in extra gentle, lush progress. This plant is prone to aphids, and they’re extra drawn to that gentle, tender progress. 

Bee Balm

You need to by no means fertilize bee balm in August for a similar causes as milkweed. Late fertilization retains the plant in an energetic progress mode and reduces its potential to retailer vitality. It additionally encourages new progress, which will likely be susceptible to frost harm.