Most shampoo and conditioner recommendations for dry hair treat the two products as a matched set: buy this shampoo, use this conditioner, problem solved. Seems logical. It’s also the reason so many people with dry hair end up cycling through products that partially work, or work at first and then seem to stop, or work on the lengths but not the scalp, or work on the scalp but leave the ends wanting more.

The problem isn’t the products. It’s the framing. Your scalp and your ends are not the same thing, and the best routine for dry hair is one that addresses them separately and deliberately rather than asking one product to solve two different problems at once.

This article is built around that distinction. It covers what dry hair actually needs at the scalp (which a shampoo addresses), and what it needs at the lengths and ends (which a conditioner addresses) and why understanding both is what allows you to choose your own best routine rather than following someone else’s.

For dry hair that’s also frizzy, best shampoo and conditioner for dry frizzy hair covers the formulation logic and which bars address the problem at the source.

The insight most dry hair advice misses

Dry hair is typically described as a whole-head condition. Use a moisturising shampoo. Use a rich conditioner. Avoid anything stripping. These are decent principles but they collapse an important distinction: the scalp is not the same as the mid-lengths and ends, and dry hair is more often a scalp condition than it is a uniform hair condition.

Your scalp produces sebum which is the natural oil that keeps hair moisturised and the scalp’s barrier function intact. Dry hair at the scalp means the sebaceous glands are producing less of it than average, which affects the scalp environment and the first few centimetres of hair closest to the roots. But sebum travels down the hair shaft slowly, affected by hair texture, length, porosity, and how often the hair is handled. Coarser hair textures are particularly prone to this, meaning the rougher cuticle surface makes it harder for natural oils to travel from root to tip, which means the ends of coarse dry hair can be genuinely moisture-depleted regardless of what the scalp is doing.

The practical upshot: your shampoo’s job is to clean the scalp without overcleaning it. Your conditioner’s job is to address the mid-lengths and ends which really is a completely separate brief. The best shampoo for dry hair and the best conditioner for dry hair are chosen on different criteria, and the two choices are more independent than matched-set marketing would have you believe.

What dry hair shampoo needs to do

For a dry scalp, the goal is a clean that removes what’s there (product residue, environmental debris, excess oil) without stripping the oils the scalp is already producing conservatively. Squeaky clean is the enemy. Squeaky clean on a dry scalp is stripped.

The formula specifics that make this possible in a syndet shampoo bar:

Lower SCI percentage. The Batch and Bubble dry hair shampoo formula uses SCI at 52%, down from 65% in the oily hair bar. SCI is a gentle surfactant at any percentage, but lower concentrations do less cleansing work per wash, which is exactly right for hair that’s washed two or three times a week rather than daily. At 52%, the cleansing is thorough without being aggressive.

Minimal kaolin clay. At 3%, kaolin in the dry hair formula contributes slip and texture during the wash without meaningful oil absorption. On hair that isn’t producing excess sebum, high clay percentages work against the formula’s purpose by removing oils the scalp needs. Keeping it low preserves the slip benefit while neutralising the absorption problem.

More jojoba oil. At 9% (compared to 2.4% in the oily hair formula) jojoba provides genuine conditioning at the lengths during washing. The bar is still primarily cleansing; the surfactants do that work. But the higher oil percentage leaves hair feeling balanced rather than tight after rinsing.

More glycerine. At 4% versus 1% in the oily hair bar, glycerine draws moisture toward the hair during washing and contributes to how hair feels after drying. For a scalp that isn’t producing generous natural moisture, this matters.

The result is a bar that cleans well enough to do its job and gently enough not to undo it.

Try the base dry hair shampoo bar first. Once you’re ready to get adventurous, the sea mist and peppermint dry hair bar is the coolest formula in the range, literally. Full recipe and peppermint intensity notes at sea mist and peppermint dry hair shampoo bar.

What the dry hair conditioner needs to do — and why this is your choice, not mine

Here’s where the routine becomes genuinely personal, and where a blanket recommendation would be doing you a disservice.

Conditioner goes on mid-lengths and ends, not the scalp. What those lengths and ends need depends on factors your scalp type doesn’t determine: length, porosity, heat styling frequency, chemical treatment history, and how your hair actually responds to conditioning. Dry hair at the scalp doesn’t automatically mean severely dry hair at the ends. Someone with short dry hair that’s never been coloured or heat-styled has different conditioning needs from someone with long, bleached, daily-straightened dry hair, even if their scalps are producing oil at the same rate.

This is why the Batch & Bubble conditioner bar range is built around conditioning weight rather than hair type labels. There are three base formulas. Here’s what each one does and who it suits, because the decision is yours to make with your own hair as the reference point:

Lightweight conditioner bar — BTMS-50 at 57%, shea butter at just 3%, minimal jojoba. Maximum conditioning emulsifier, minimal added fat. Conditions without weight. Best for short dry hair, infrequent washers, or hair whose ends are in reasonable condition and don’t need intensive moisture. If you tend to skip conditioner because everything feels too heavy, this is the starting point.

Moderate conditioner bar — BTMS-50 at 54%, shea at 6%, jojoba at 4%. The most broadly applicable formula. Provides genuine conditioning for ends that need more than a lean formula delivers, without tipping into richness that weighs down fine or medium hair. A good starting point if you’re unsure…assess after a few washes and adjust up or down from there.

Deeply nourishing conditioner bar — BTMS-50 at 46%, shea butter at 15%, jojoba at 8%, no clay. The richest formula in the range, designed for ends that are genuinely dry, damaged, bleached, or colour-treated. If your ends feel rough or brittle after washing or your current conditioner never quite feels like enough, this is the formula built for that situation.

The what conditioner bar should I use guide walks through the decision in more detail if you want more structure before choosing. The point here is that you’re not looking for the one right conditioner for dry hair, you’re looking for the right conditioner for your dry hair, at its specific length, with its specific history.

What this routine has done for real hair

My partner has short, dry hair. He washes once or twice a week, which is right for his scalp’s oil production and the length of his hair as there’s simply no reason to wash more often. He uses the dry hair shampoo bar and the lightweight conditioner bar, which for short, infrequently-washed hair is the right pairing. His verdict after the first wash with the dry hair formula, having previously used my oily hair bar:

“My hair is soft. I love it.”

The contrast matters here. The oily hair bar on dry hair produces exactly the stripped, squeaky, uncomfortable result you’d expect when 65% SCI and 6.6% kaolin meet a scalp that doesn’t have excess oil to spare. Moving to the right formula for him which is lower SCI, lower clay, higher jojoba and glycerine, resolved it immediately.

A colleague with shoulder-length, coarse, dry hair uses the same shampoo formula. Coarse hair tends toward dryness because the cuticle structure makes it harder for natural oils to travel from scalp to ends, leaving the mid-lengths and ends moisture-depleted regardless of scalp oil production. She uses the deeply nourishing conditioner bar given the combination of length, texture, and ends that need more than a lightweight formula provides. The shampoo stays the same but the conditioner changes based on what her ends tell her they need.

Two people, same shampoo bar, different conditioner choices. Both working well. That’s the routine-building logic in practice.

Building your own routine

The framework is simple once the distinction between scalp and ends is clear:

For the shampoo: start with the dry hair syndet shampoo bar recipe. It’s tested, the formula rationale is fully explained, and every ingredient is documented so you understand what’s doing what. If after a few weeks your hair still feels stripped, reduce the kaolin to 2% or remove it entirely in your next batch. If it doesn’t feel clean enough, you may be closer to normal hair than dry and the normal hair shampoo bar formula is the next step up.

For the conditioner: use your ends as the guide, not your scalp type.

• Short hair with ends in good condition: lightweight.
• Normal-length dry hair: moderate as a starting point.
• Bleached, heat-damaged, or colour-treated ends: deeply nourishing.

The how to use a conditioner bar guide covers application technique, which matters more for conditioner bars than for liquid conditioner given the concentrated formula.

On frequency: if you’re currently washing at a frequency based in habit rather than necessity, it’s worth experimenting with leaving a wash until absolutely necessary. A dry scalp that’s being washed too often may be producing less oil than it should because frequent washing is removing what’s there before the scalp registers it.

The transition period: switching from a sulphate shampoo to a syndet bar is gentler for dry hair than for oily hair because there’s less sebum overproduction to recalibrate and typically less silicone buildup to clear. The shampoo bar transition period article covers what to expect. For most dry hair, the adjustment is mild and short.

Find out if the dry hair shampoo is right for you: take the quiz and get tailored recipes delivered straight to your inbox:

Why making your own puts you in control

A routine built from products you’ve made yourself is a routine you understand completely. You know the SCI is at 52% and why that matters for dry hair. You know the conditioner bar formula you’ve chosen and what specifically it’s delivering. When something needs adjusting (maybe the shampoo feels slightly too stripping, or the conditioner feels slightly too heavy), you know which lever to pull rather than starting over with a different commercial product.

That knowledge grows. The first batch teaches you what your scalp needs. The second batch adjusts for it. By the third batch, you have a formula that’s calibrated specifically to your hair rather than to a generalised “dry hair” category that contains everyone from slightly-parched-ends to bleached-and-damaged. No commercial product can iterate on your specific feedback the way your own formulation can.

If you’re new to making your own bars and not sure where to start, are shampoo bars good for your hair gives the honest overview of the format before you commit to buying ingredients.

Neets is a Brisbane-based home formulator and the founder of Batch and Bubble. She has an applied science degree, makes all her own bars, and has learned most of what she knows about dry hair from the people in her life whose hair is nothing like hers.