October is often a decision month for a horse paddock. The soil may still be warm enough for limited repair work, but shorter days, heavier rain and falling temperatures mean there is less room for error. It is also the point when worn gateways, trough areas and favourite tracks begin to show where winter mud is likely to develop.The answer is not automatically to add lime, fertiliser or grass seed. Start by finding out what is limiting the paddock, then choose the smallest useful intervention.Start with what the paddock is telling youWalk the whole field rather than judging it from the gateway. Mark the areas where grass is thin, water collects, horses repeatedly travel or the soil has become capped and compacted. Thin grass across a wide area may point to soil fertility, pH, drainage, grazing pressure or several factors together. Bare strips beside fences or gateways are usually linked to traffic and compaction. Muddy ground around a trough may be made worse by a leak, poor drainage or horses gathering in one place. Strong grass in some areas but weak growth elsewhere suggests the paddock should not necessarily be treated as one uniform block.This simple assessment matters because lime cannot repair compaction, grass seed cannot overcome constant hoof traffic and fertiliser cannot correct waterlogging.Test the soil before applying limeYou cannot reliably diagnose acidic soil by looking at the grass. A laboratory soil test provides the pH and nutrient information needed to decide whether lime or fertiliser is justified.CAFRE's soil-analysis guidance for horse owners gives a typical target pH of 6.06.2 for grassland paddocks on mineral soil, while noting that the optimum varies with soil type. The result and the laboratory recommendation should guide the product and application rate rather than a general seasonal rule.For a representative sample, treat differently managed paddocks as separate areas. Walk each area in a W pattern, combine multiple small cores in a clean container and avoid unusual spots such as gateways, tracks, feeding points and manure heaps. Follow the laboratory's instructions on depth and timing. AHDB's grassland soil-assessment guidance advises allowing sufficient time after manure, fertiliser or lime applications so the result is not distorted.What lime can and cannot doWhere a soil test confirms that the pH is too low, an appropriate liming product can raise pH and improve the availability of nutrients already present in the soil. This may help grass use fertiliser more efficiently and support healthier root growth.Lime is not a general cure for a tired paddock. It will not: remove deep compaction; repair damaged drains or redirect surface water; protect seedlings from grazing; reduce excessive stocking pressure; or make an unsuitable seed mixture suitable for horses.If lime is recommended, use the test result to choose the correct material and rate. Follow the current product label, spreading instructions and grazing guidance, and seek agricultural advice where the result or application rate is unclear.Is October too late to repair bare patches?October can still offer a short repair window in milder parts of the UK, but conditions matter more than the date. Grass seed needs adequate soil warmth, moisture and seed-to-soil contact, followed by enough time without hoof traffic to establish.As autumn advances, colder soil slows germination and wetter ground becomes harder to prepare without causing more compaction. AHDB notes that later autumn reseeding carries greater establishment risk as soil temperatures fall and weather becomes less dependable. If the ground is cold, saturated or likely to be grazed immediately, mark the repair for spring rather than wasting seed.Where conditions remain suitable, concentrate on manageable patches: Remove debris and identify why the area became bare. Relieve only the compaction that can be addressed without working saturated soil. Prepare the surface according to the seed supplier's instructions. Choose a mixture suited to the intended use, such as grazing or a hard-wearing access area. Create good seed-to-soil contact and protect the area until the roots are properly established.Browse our horse paddock grass seed and fertiliser collection to compare the options Chestnut Mill currently stocks.Fix the cause of high-traffic wearReseeding the same worn spot every year is rarely the best long-term answer. Use October to change the way horses, people and water move through the paddock. Gateways: spread traffic where practical and consider suitable hard standing before the ground becomes deeply poached. Water troughs: check for leaks, overflowing valves and runoff that is being directed onto the standing area. Hay and feeding points: use suitable feeders on firm ground and move them before one route becomes badly churned. Favourite tracks: rotate access or fence off the weakest section so it can rest. Wet hollows: keep ditches and existing drainage routes clear, and seek professional advice before undertaking drainage work.The British Horse Society's autumn pasture guidance also recommends checking hard standing around gates and troughs, maintaining drainage and completing soil analysis if it was not done in spring.Should you apply Suregrow Fertiliser in October?Suregrow Fertiliser is formulated for horse and pony paddocks and its current manufacturer guidance includes an autumn application window from September to mid-November. The published autumn rate is four 20kg bags per acre.That window does not mean every paddock needs an October application. Consider the soil test, current grass growth, moisture, drainage and grazing pressure first. Apply only at the current labelled rate and follow all manufacturer instructions, including the stated grazing conditions. Fertiliser is unlikely to provide good value on saturated, severely compacted or continually overgrazed ground.Protect the grass already presentEstablished turf is the paddock's best defence against winter damage. Protecting it now may achieve more than trying to force late growth. Rotate or rest ground before horses graze it down to bare soil. Fence off newly repaired areas and do not return horses before the roots are secure. Keep poo-picking to reduce rejected patches and support parasite control. Use the best-drained area for wetter periods where your layout allows. Continue checking beneath oak and sycamore trees for seasonal hazards. Plan a winter turnout or sacrifice area before prolonged rain removes your options.Your October horse paddock checklist Map thin, compacted and waterlogged areas. Arrange a soil test before buying lime or fertiliser if pH and nutrient status are unknown. Use the test recommendation rather than applying lime automatically. Sow only where soil conditions and sufficient resting time make establishment realistic. Fix leaks, drainage problems and traffic patterns that repeatedly damage the same ground. Protect existing grass from overgrazing and poaching. Prepare gates, trough areas and winter access before the wettest weather arrives.If you are still managing an active autumn flush, begin with our September horse paddock checklist. October is the point to become more selective: test before treating, repair only where establishment is realistic and protect the ground you will need through winter.