There’s nothing quite like a fresh-picked tomato, cucumber, or leafy green right out of the garden. But a vegetable garden requires work to improve the soil and manage weeds, along with battling bugs and keeping it in good shape year after year.
A productive vegetable garden needs fertile soil that is full of nutrients, so after a good summer of harvests you should not rest on your laurels. Fall is a great time to make efforts to fertilize your vegetable garden, and put nutrients back into the soil ready for next season’s crops.
Keeping the nutrient levels of soil high was highly important in all of the vegetable gardens I worked in. We made sure to feed the soil throughout the year, including in fall. This primarily came in the form of mulches and cover crops that were utilized to put nutrients back into the earth.
There are other feeds that can be added to help benefit plants still growing in the fall vegetable garden. Getting the timing right to apply such feeds is important to ensure the plants can take advantage before slowing down for winter.
Reasons to fertilize in the fall
crop rotation when planning a kitchen garden so that crops can actually put nutrients back into the soil.
The primary reason for fertilizing a vegetable garden in the fall is to help to rebuild those nutrient levels in the soil ready for future crops. A productive summer crop of vegetables will have expended many of the nutrients, and replenishment is important to ensure productive crops come the next season.
Think of feeding the vegetable garden in fall as an important proactive step to ensuring you get good yields from future vegetables planted in the garden. Not continually working to improve the soil is a vegetable gardening mistake that can result in under-performing crops and a reduction in any potential harvests.
Charmaine Peters is the Farm Director at Arden and she says that fertilizing in fall means the nutrients remain in the soil over the winter, giving plants immediate access to these nutrients come spring.
She adds: ‘In this way, we can support vigorous spring growth, resulting in healthier plants and potentially earlier harvests. And because the soil is ready for planting, you can save time and effort by not having to rush to fertilize your garden beds after the frost ends, and instead focus on planting and other spring gardening tasks.’
Fertilizing in the fall can also benefit existing vegetable and herb plants that may be present and growing in the kitchen garden. These plants will still be growing and developing root systems all the way up until they go dormant for winter. Charmaine Peters says: ‘Plants shift their energy from top growth to root development in order to produce higher concentrations of amino acids and sugars that help them resist freezing over the winter. This is why we should support the roots more during this season through fertilization.”
Ground left empty and fallow over winter can leach nutrients and be eroded, so covering the ground – either by mulching or with cover crops that are grown to add nutrients back – helps maintain the health of any vegetable garden. Mulching a vegetable garden and spreading a good thick layer of mulching materials can stop the soil freezing, prevent soil erosion, and it will be incorporated into the soil by worms to help boost the fertility levels.
US hardiness zone and weather patterns. At this stage, any plant still growing will be able to take advantage of the added nutrients before going dormant for winter.
Lindsey Chastain, a homesteader and founder of The Waddle and Cluck, advises that the latest you would want to fertilize is around four weeks before the first frost date. She says: ‘Any later can leave fresh fertilizer in the soil over winter, where it may leach out from rain or snow. Aim to fertilize around early to mid-October in most regions. In zone 7b, we do our final fertilization one week before Halloween.’
If you are mulching the vegetable garden in fall, then the materials can be spread at any time in the fall period. The vegetable gardens I worked in tended to mulch in October. You want to get the mulch down in fall and before the frosts, as you never want to mulch on top of frozen ground.
Gene Caballero, co-founder of GreenPal and with a background of over 25 years in the landscaping industry, says bone meal is ‘rich in phosphorus’ and ‘promotes root development’ in plants still actively growing in fall. Gene also recommends that gardeners use products ‘with a higher last number on the NPK ratio’ in fall – these plant fertilizer numbers show the make-up of nitrogen, phosphorus and potassium in the product.
When it comes to types of mulches that can be used over fall and winter, I have personally found success using compost or leaf mould as a mulching material that was spread on the surface over the fall period. Other options to spread include the likes of well-rotted manure, wood or bark chippings, and pine needles.
There is a wide range of cover crops that can be sown in fall and left to grow over fall and winter to put nutrients back into the soil. These include the likes of rye, buckwheat or planting fava beans as a cover crop, while I have also personally used phacelia and crimson clover successfully as winter cover crops in vegetable gardens. You can see a range of cover crop seeds at True Leaf Market.
chicken manure pellets from Amazon to spread easily in the vegetable garden.
When you are starting a vegetable garden it is important to remember to continually feed and enrich the soil. Keeping that level of nutrients up is important for any kitchen garden idea on any soil type and fertile soil can be the difference between success and failure when it comes to growing vegetables.