Ultra Growth Guide: Oils, Masks and Routines That Work Best

An educational guide from the Beauty AMZ research team. No hard sell, just what you need to know.
Why hair thins and breaks
Hair thins from genetics, stress, poor nutrition, and damage. Breakage makes hair look thin even when growth is normal. Heat styling and tight styles snap strands. Dryness makes ends fray and split. Addressing breakage is the fastest way to look fuller. Oils and masks target exactly this problem.
Scalp circulation basics
Follicles need blood flow to grow strong hair. Massage physically boosts circulation to the scalp. Warm oil makes massage smoother and more effective. Five minutes a day is enough to help. Think of it as exercise for your scalp. Consistency beats intensity here.
Castor oil for hair science
Castor oil is unusually thick and rich in ricinoleic acid. The thickness coats strands and locks in moisture. Ricinoleic acid has soothing properties for the scalp. It does not penetrate deeply, which makes it a great sealant. Use it as the last step over lighter oils. A little goes very far.
Masking vs oiling
Oiling feeds the scalp before washing. Masking repairs the lengths after washing. They solve different problems in one routine. Oil first for growth support, mask weekly for strength. Skipping either leaves a gap. Together they cover the full strand from root to tip.
Diet and hair health
Hair needs protein, iron, and vitamins to grow well. Biotin and zinc support keratin production. Crash diets often trigger shedding months later. Oils work from the outside, food works from the inside. The best results come from both together. No topical product replaces good nutrition.
Recommended Products
Our top Ultra Growth picks cover the daily oil, the weekly mask, and the growth shampoo.

Best for: daily scalp growth treatment
Ultra Growth Natural Hair Growth Oil with Basil and Castor Oil, 8 fl oz
- Basil and castor oil blend
- 98 percent natural origin
- Precision dropper bottle
Pros
- Targets scalp directly
- Strengthens from root to tip
Cons
- Needs consistent daily use
- Oily if overapplied

Best for: weekly deep conditioning
Difeel Ultra Growth Basil and Castor Hair Mask, 12 oz
- Basil and castor oil formula
- Deep conditioning treatment
- Sulfate and paraben free
Pros
- Repairs dry brittle hair
- Boosts shine and thickness
Cons
- Weekly time commitment
- Rinse out only

Best for: washing within the growth routine
Difeel Ultra Growth Shampoo with Basil and Castor Oil, 33.8 oz
- Growth shampoo, 1 liter size
- Sulfate free cleansing
- Basil and castor oils
Pros
- Huge value size
- Gentle daily cleanse
Cons
- Big bottle to store
- Needs the conditioner for best results
Ready to Choose?
See our top product picks for ultra growth, or jump straight to the head-to-head comparison of the two most popular options.
Penetrating Oils Versus Sealing Oils: Which Job the Ultra Growth Oil Does
Not all hair oils enter the hair shaft, and knowing the difference changes how you use the Difeel Ultra Growth Natural Hair Growth Oil. Castor oil, the star ingredient here along with basil oil, is a sealing oil. Its thick, viscous texture sits on top of the hair and scalp, locking in existing moisture and creating a protective barrier. It does not penetrate the shaft the way coconut or olive oil can. That makes it excellent as a scalp treatment and as a pre-wash protector, but a poor choice as a lightweight daily finisher, since it will look greasy on the lengths.
Porosity decides which type you need most. Low-porosity hair has a tight cuticle that resists penetration, so sealing oils like castor work well on top of damp hair to hold moisture in. High-porosity hair drinks up penetrating oils but still benefits from a castor seal on the ends. The Ultra Growth mask in this line does the deeper conditioning job during wash day, while the oil handles the scalp and sealing work. A pea-sized amount warmed between palms is enough for the ends; the scalp gets its own light application with a massage.
Oiling Under Protective Styles Without the Buildup
Braids, twists, and weaves make scalp care tricky, because you cannot wash normally for weeks at a time. The Ultra Growth oil works well here, but the method matters. Apply it with an applicator bottle with a pointed tip so the oil reaches the scalp between parts instead of sitting on the braids themselves. Oil the scalp only, not the braided hair, and use light layers twice a week rather than one heavy drench. Heavy application under a protective style traps sweat and product against the scalp, which can cause itching, odor, and even follicle irritation over a multi-week install.
Pair the oil with a diluted shampoo rinse or a scalp cleansing spray between full wash days to remove buildup. When you take the style down, do a proper clarifying wash before restarting your growth routine, since weeks of layered oil need a real reset. Shoppers comparing growth routines can see how the full Difeel line works together in our Ultra Growth buyer guide, and the top models comparison ranks the oil against competing growth formulas. For a deeper dive on the brand's approach, the Difeel Ultra Growth guide walks through the ingredient philosophy.
Tracking Growth Objectively Instead of Guessing
Hair growth products get judged unfairly because nobody measures. Hair grows roughly half an inch per month, which is invisible week to week, so buyers declare a serum a failure at week three or credit it for normal growth at month two. The fix is a standardized photo method: same lighting, same part line, same camera distance, once a month. Photograph your part width and your hairline, since density changes show there before length changes do.
Give any growth routine a full ninety days before judging, because the hair growth cycle runs in months, not weeks. Shedding that increases slightly in the first month can be normal as weak hairs cycle out, but shedding that worsens after six weeks deserves a dermatologist visit. The Ninety Day Test section of this guide explains the cycle in detail, and honest tracking is what separates a routine that works from wishful thinking.